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8th Grade Packet #3
April 22-May 6
Days 21-30
Notes for Exponents & Scientific Notation (p. 1-2)
Day 21- Exponents Review (p. 3-4)
Day 22- I-Ready
Day 23- Lesson 5 (p.5-8)
Day 24- Lesson 6 (p.9-12)
Day 25- Exponents & Scientific Notation Review #1 (p.13-15)
Day 26- Exponents & Scientific Notation Review # 2 (p.16-17)
Day 27- I-Ready
Day 28- Quiz (p.18-20)
Day 29- Notes & Geometry Review #1 (p.21-30)
Day 30- Geometry Review #2 (p.31-36)
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Rules of Exponents
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Product Rule : When multiplying
exponents with the same base, keep the
base and add the powers.
Quotient Rule : When dividing exponents with the same base, keep the base and subtract the
powers.
Power of a Power Rule : To raise a power to a power, multiply the
exponents.
Power of a Product Rule : Each base is raised to the
same power.
Negative Exponent Rule :
A negative exponent causes the number to
be re-written as the reciprocal of the
original number and the exponent
becomes positive.
Zero Exponent Rule :Any number raised to the zero power is equal to one.
xn i xm = xn+mxn
xm= xn−m
(xn )m = xnm
x−n = 1xn(xy)m = xmym
n0 = 1
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Scientific Notation
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
All About Scientific Notation :
• When a number is written in scientific notation, there is only one non-zero number in front of the decimal. That number is multiplied by an exponent with a base of ten. • If a number written in scientific
notation has a negative exponent, it means the number is less than one but greater than zero. • If a number written in scientific
notation has a positive exponent, it means the number is greater than one.
Multiply & Divide :You can multiply and divide two numbers written in scientific notation. 1. Split the expressions into
constants and powers of ten. 2. Multiply the constants. 3. Multiply the powers of ten
(using the product rule). 4. Write your answer in scientific
notation.
Add & Subtract :You can add and subtract two expressions written in scientific notation. 1. Raise all powers of 10 to
the same exponent by moving the decimal point left or right (changing the power of ten). Move left if you are increasing an exponent and right if you are decreasing it.
2. Add or subtract the constants.
Writing in Scientific Notation :
• Move the decimal the left or right until there is a single digit (not zero) in front of the decimal.
• Count the number of places the decimal was moved. This becomes your exponent.
• If you moved the decimal to the right, the exponent will be negative.
• If you moved the decimal to the left, the exponent will be positive.
• Write the number as x.xx � 10#
(6.4 � 105) (3.2 � 108)
(6.4 � 3.2) (105 � 108)
(20.48) � 1013
20.48 � 1013
2.048 � 1014
6.4 � 105 + 3.2 � 108
0.0064 � 108 + 3.2 � 108
(0.0064 + 3.2) � 108
3.2064 � 108
8WB8-32
2014 University of Utah Middle School Math Project in partnership with the
Utah State Office of Education. Licensed under Creative Commons, cc-by.
8.1f Homework: Properties of Exponents Mixed Practice
Directions: Simplify each expression. Assume that no denominator is equal to zero.
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Day 21
8WB8-33
2014 University of Utah Middle School Math Project in partnership with the
Utah State Office of Education. Licensed under Creative Commons, cc-by.
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©Curriculum Associates, LLC Copying is not permitted.44 Lesson 5 Scientific Notation
Guided Practice
Practice
Lesson 5
Study the example below. Then solve problems 19–21.
Example
Write 0.0000408306 in scientific notation.
Look at how you could solve this problem.
In scientific notation, the solution will look like n • 10a. n must be greater than or equal to 1 and less than 10. a must be an integer.
To write 0.0000408306 in scientific notation, first move the decimal point 5 places to the right. Then multiply that number by a power of 10. The exponent in that power of 10 will be 25, which is found by counting the number of places the decimal is moved to the right.
Solution
19 Earth is about 5,974,000,000,000,000,000,000,000 kg. Write this number in scientific notation.
Show your work.
Solution
Pair/ShareWhat is another method you could use to write the number in scientific notation?
Pair/ShareExplain why the procedure used to write a number in scientific notation works.
0.0000408306 5 4.08306 3 1025
The student moved the decimal point the number of places necessary to get a number greater than or equal to 1 and less than 10.
Do you move the decimal point to the right or to the left to write the number in scientific notation?
Writing and Comparing Numbers in Scientific Notation
Day 23
©Curriculum Associates, LLC Copying is not permitted. 45Lesson 5 Scientific Notation
20 Use the information in the table to solve the problem.
Orbiting Body Approximate Distance from the Sun (in miles)
Mercury 36,300,000
Mars 142,000,000
Neptune 2,800,000,000
Pluto 3,670,000,000
Show your work.
Write each distance in scientific notation.
Mercury
Mars
Neptune
Pluto
Neptune is about how many times as far from the Sun as Mars is from the Sun?
Solution:
21 Which is equivalent to 8.03 3 1028?
A 2803,000,000
B 20.0000000803
C 0.0000000803
D 803,000,000
Eva chose D as the correct answer. How did she get that answer?
Pair/ShareHow does writing numbers in scientific notation make numbers easier to work with?
Pair/ShareTalk about the problem and then write your answer together.
Will the solution be a negative number or positive number?
Will the exponent be positive or negative?
Independent Practice
Practice
©Curriculum Associates, LLC Copying is not permitted.46 Lesson 5 Scientific Notation
Lesson 5
Solve the problems.
1 Which of the following expressions is equivalent to 5,710,900?
A 5.7109 3 1026
B 5.7109 3 102
C 5.7109 3 103
D 5.7109 3 106
2 The average distance from Pluto to the Sun is about 6 3 109 kilometers. The average distance from Mars to the Sun is 2 3 108 kilometers. The average distance from Pluto to the Sun is about how many times as great as the average distance from Mars to the Sun?
times
3 Last year a business earned 4.1 3 106 dollars in income. This year the business earned 2.05 3 108 dollars in income. Which best describes how this year’s earnings compare to last year’s earnings?
A This year the business earned about 0.5 times as much as it did last year.
B This year the business earned about 2 times as much as it did last year.
C This year the business earned about 50 times as much as it did last year.
D This year the business earned about 100 times as much as it did last year.
Writing and Comparing Numbers in Scientific Notation
Self Check
©Curriculum Associates, LLC Copying is not permitted. 47Lesson 5 Scientific Notation
Go back and see what you can check off on the Self Check on page 1.
4 Write the following numbers in order from least to greatest.
5 3 1026 29 3 1023
20.0000002 0.00007
Least Greatest
5 Cara was using her calculator to solve a problem. The answer that displayed was 1.6E+12. She knows that she entered all of the numbers correctly. Why did the calculator give the answer it did? What is the answer to Cara’s problem?
6 The length of a city block running north to south in New York City is about 5 3 1022 miles. The distance from New York City to Mumbai, India, is about 7.5 3 103 miles. The distance from New York City to Mumbai is about how many times the length of a New York City north-south block?
Show your work.
Answer
Guided Practice
Practice
©Curriculum Associates, LLC Copying is not permitted.54 Lesson 6 Operations and Scientific Notation
Lesson 6
Study the example below. Then solve problems 17–19.
Example
A hardware factory produces 3.6 3 105 bolts in 2,400 minutes. What is the factory’s rate of production in bolts per minute?
Look at how you could solve this problem.
Solution
Express 2,400 in scientific notation.
The quotient of products equals the product of quotients.
Subtract the exponents to find the quotient of powers.
2,400 5 2.4 3 103
total bolts ·········· total minutes 5 rate in bolts per minute
3.6 3 105 ········ 2.4 3 103 5 3.6 ··· 2.4 3 105
··· 103
5 1.5 3 105 2 3
5 1.5 3 102
The factory produces 1.5 3 102, or 150, bolts per minute.
17 A company spends a total of $64,500,000 on salaries for its workers. If the company has 1.5 3 103 workers, what is the average salary per worker?
Show your work.
Solution
Pair/ShareWould you rather solve this problem with both numbers expressed in standard form or in scientific notation? Explain.
Pair/ShareWhat are the advantages to solving this problem using scientific notation?
Using Operations with Scientific Notation
In this problem you will need to divide numbers expressed in scientific notation.
Which operation will you need to use to solve this problem?
Day 24
©Curriculum Associates, LLC Copying is not permitted. 55Lesson 6 Operations and Scientific Notation
Pair/ShareCompare the stalactite’s rate of growth with a child’s rate of growth.
Pair/ShareTalk about the problem and then write your answer together.
18 Stalactites are cone-shaped formations that hang from the ceilings of underground caverns. Stalactites can grow at the rate of about 0.005 inch per year. At this rate, what is the length of a stalactite that grows for 7.5 3 104 years?
Show your work.
Solution
19 The planet Mercury is about 57,900,000 kilometers from the sun. Pluto is about 1.02 3 102 times farther away from the sun than Mercury. About how many kilometers is Pluto from the sun?
A about 5.91 3 1014 kilometers
B about 4.77 3 109 kilometers
C about 5.91 3 109 kilometers
D about 5.68 3 105 kilometers
Maya chose D as the correct answer. How did she get that answer?
How would you express the distance between Mercury and the sun in scientific notation?
Would it be easier to solve this problem with numbers in scientific notation, fractions, or as they are written?
Independent Practice
Practice
©Curriculum Associates, LLC Copying is not permitted.56 Lesson 6 Operations and Scientific Notation
Lesson 6
Solve the problems.
1 A national restaurant chain has 2.1 3 105 managers. Each manager makes $39,000 per year. How much does the restaurant chain spend on mangers each year?
A 2.49 3 108 dollars
B 8.19 3 109 dollars
C 6 3 109 dollars
D 8.19 3 1020 dollars
2 The Moon takes about 28 days to orbit the Earth, going a distance of about 2.413 3 106 kilometers. About how many kilometers does the Moon travel during one day of its orbit around the Earth?
A 8.6 3 104 km
B 2.8 3 106 km
C 1.16 3 107 km
D 6.8 3 107 km
3 Jackie incorrectly simplified the following expression.
(4 3 1026) 3 3,000
Select each step that shows an error based solely on the previous step.
A Step 1: (4 3 1026)(3 3 103)
B Step 2: (4 3 3)(1026 3 103)
C Step 3: 12 3 1023
D Step 4: 1.2 3 1024
Using Operations with Scientific Notation
Self Check
©Curriculum Associates, LLC Copying is not permitted. 57Lesson 6 Operations and Scientific Notation
Go back and see what you can check off on the Self Check on page 1.
4 A certain type of bug can jump 3.5 3 102 times the length of its body. If one of these bugs is 8 3 1023 meters long, how far can it jump? Write your answer in both scientific notation and in standard form.
Show your work.
Answer
5 Toshi and Owen want to solve this problem:
Earth has a mass of about 5.97 3 1024 kg. Neptune has a mass of about 1.024 3 1026 kg. How many times greater is the mass of Neptune than the mass of Earth?
Toshi says the answer is 1.7 3 101. Owen says the answer is 6.1 3 1050. Who is correct? What mistake did the other student make?
6 Evaluate (7.3 3 106) 3 (2.4 3 107) ··················· (4 3 104)
.
Show your work.
Answer
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 1
EXPONENTS & POWERS
READ & UNDERSTAND (Highlight or circle
important keywords.)
Sumpter Middle School has collected a total of 54 ⋅ 73 canned goods for their annual food drive. They plan to donate all of the cans to various food pantries in the city. How many canned goods will they donate?
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.)
________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 2
EXPONENTS & POWERS
READ & UNDERSTAND (Highlight or circle
important keywords.)
Handy Electronics has decided to give 105 dollars to their sales managers as an end-of-year bonus. If the company has 103 sales managers and the money is divided equally among them, how much will each sales manager receive?
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Day 25
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 3
EXPONENTS & POWERS
READ & UNDERSTAND (Highlight or circle
important keywords.)
Naomi and Douglas each have a baseball card collection. Naomi has two thousand baseball cards in her collection. Douglas has (42)3 baseball cards in his collection. Who has more baseball cards?
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 4
EXPONENTS & POWERS
READ & UNDERSTAND (Highlight or circle
important keywords.)
Nigel is training for a marathon. He runs 25 miles on Monday and 27 miles on Thursday. How many times farther did Nigel run on Thursday than on Monday?
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 1
SCIENTIFIC NOTATION
READ & UNDERSTAND (Highlight or circle
important keywords.)
Savemore National Bank starts the day with 2.81 × 104 dollars in the vault. At the end of the day, the bank has 3.5 × 105 dollars in the vault. How much more money is in the vault at the end of the day than there was in the morning?
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.)
________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
Name (s) __________________________________ Class__________ Date_________________________
©Exceeding the CORE Question # 2
SCIENTIFIC NOTATION
READ & UNDERSTAND (Highlight or circle
important keywords.)
The table shows the amount of money raised by each region for a charity organization. How much money did the East and West raise together? Region Amount Raised ($)
West 2.38 × 104 South 1.46 × 104
East 6.75 × 103 North 8.65 × 103
What do we know? (List the important facts
needed for this problem to be solved.) _________________________________________________________________________________________________________ ___________________________________ What do we want to find out? (Explain in
your own words.) _________________________________________________________________________________________________________ ___________________________________
SOLVE (Answer the problem. Show all work.)
EXPLAIN (State your answer. Give details. Explain what you did and justify your steps.) ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________
8WB8-70
2014 University of Utah Middle School Math Project in partnership with the
Utah State Office of Education. Licensed under Creative Commons, cc-by.
Sample Problem #1
Every day there is an estimated 329,000 smart phones bought in the United States.1 Every day there is an
estimated 12,000 smart phones lost or stolen in the United States.2 Approximately how many times more smart
phones are bought than are lost or stolen.
Sample Problem #2
Change the numbers below into scientific notation.
a. 3,450,000,000
b. 0.00000000455
Change the number given below into standard form.
c. 86.03 10
d. 61.2 10
Sample Problem #3
Perform the indicated operation for each problem below.
a. 8 93.13 10 2.9 10
b. 4 52.54 10 3.2 10
c. 6 8(3 10 )(5.6 10 )
d.
8
2
1.0004 10
7.2 10
Sample Problem #4
Fill in the blank with a unit of appropriate size from the column to the right.
a. The mass of trash produced by New York City in one day is 71.2 10
__________________.
kilograms
nanograms
grams
b. The period of the sun’s orbit around the galaxy is 82.4 10 ______________.
seconds
hours
years
c. The area of the Earth’s land surface is 81.49 10 __________________.
millimeters2
meters2
kilometers2
1-http://appleinsider.com/articles/14/02/20/apples-iphone-led-2013-us-consumer-smartphone-sales-with-45-share---npd,
http://www.latimes.com/business/technology/la-fi-tn-45-million-smartphones-lost-stolen-2013-20140417-story.html,
http://techcrunch.com/2013/09/19/gartner-102b-app-store-downloads-globally-in-2013-26b-in-sales-17-from-in-app-purchases/
Day 26
8WB8-71
2014 University of Utah Middle School Math Project in partnership with the
Utah State Office of Education. Licensed under Creative Commons, cc-by.
Sample Problem #5
a. A calculator gives you an answer of 3.023E , write this number in scientific notation and standard
form.
b. A calculator give an you answer of , write this number in scientific notation and standard
form.
Sample Problem #6
In the year 2013 the U.S. mint produced 92.112 10 dimes. a. Estimate the value of this money?
b. Every second 175 cups of coffee are bought at America’s most popular coffee shop.2 The average cup of
coffee at this particular shop costs $1.85. At this rate how long will it take for America to spend the 211
million dollars worth of dimes produced in 2013 on coffee at this shop? Express your answer using
appropriate units of time.
2-http://www.boston.com/business/articles/2011/09/17/starbucks_looks_for_way_to_encourage_paper_cup_recycling/
8th Unit 8 Exponents & Sci Notation Page 1 / 3
8th Unit 8 Exponents & Sci Notation [3669346] Student
Class
Date
1. In the expressions, x and y represent positive integers.
expression one: 2 • 10x
expression two: 4 • 10x + y
The value of expression two is 20,000 times greater than the value of
expression one. What is the value of y?
A. 3
B. 4 C. 5 D. 6
2.
Which expression is equivalent to ?
A. 6 × 103
B. 6 × 104 C. 6 × 1011 D. 6 × 1012
3. If 4x • 4x − 3 • 45 − x = 48, what is the value of x?
A. 0
B. 2 C. 6 D. 10
4. The speed of light is about 6.7 × 108 miles per hour. The Earth is about 2.56 × 1013 miles away from the star, Alpha Centauri. Approximately how many
hours will it take for light to travel from the star Alpha Centauri to Earth?
A. 3.82 × 104 hours
B. 3.82 × 105 hours
C. 3.82 × 1020 hours
D. 3.82 × 1021 hours
5. The circumference of Saturn is about 379,000 kilometers. The circumference
of the Earth is about 4 × 104 kilometers. Approximately how many times as large is Saturn’s circumference than Earth’s circumference?
A. 9.5 times as large
B. 11 times as large
C. 95 times as large
D. 110 times as large
Day 28
8th Unit 8 Exponents & Sci Notation Page 2 / 3
6. What is the value of the expression below?
A.
B.
C.
D.
7. The mass of Earth is about 5.972 × 1024 kg. The mass of Mercury is about
1.81 × 101 times lighter than the mass of Earth. What is the approximate mass of Mercury?
A. 1.08 × 1026 kg
B. 1.08 × 1024 kg
C. 3.30 × 1024 kg
D. 3.30 × 1023 kg
8. What is 0.00000000782 in scientific notation?
A. 7.82 × 10–9
B. 7.82 × 10–8
C. 7.82 × 108
D. 7.82 × 109
9. A penny has a diameter of 0.75 inches. If 1.0 × 104 pennies were placed in a
line, how long would the line be?
A. 7.5 × 103 inches
B. 7.5 × 104 inches
C. 7.5 × 105 inches
D. 7.5 × 106 inches
10. The population of New York is about 8.2 × 106 people. The population of
Berkeley is about 1.1 × 105. About how many times larger is the population
of New York than the population of Berkeley?
A. 15 times larger
B. 70 times larger
C. 75 times larger
D. 150 times larger
11. What is the value of 7–4 × 73?
A.
B. C.
D.
8th Unit 8 Exponents & Sci Notation Page 3 / 3
12. Which expression is equivalent to 42 ÷ (42)–3?
A. 4–4
B. 4–3 C. 44 D. 48
13. Which expression is equivalent to ?
A. –84
B. –25 C. 2–5 D. 8–4
14. What is the value of
A.
B.
C. 20 D. 144
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Congruency & Similarity
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Transformations : • Translations : • Vertical or horizontal slide
• Reflections : • Vertical or horizontal flip
• Rotations : • 90o, 180o or 270o clockwise or
counter-clockwise rotation around a point.
• Dilations : • A stretch or shrink using a given
scale factor.
Ordered Pairs & Transformations :
Reflections :• x-axis (x, y) to (x, –y)• y-axis (x, y) to (–x, y)• y = x (x, y) to (y, x)Rotations :• 90o counterclockwise (x, y) to (–y, x)• 180o counterclockwise (x, y) to (–x, –y)Translations :• (x, y) to (x + a, y + b) Dilations :• (x, y) to (kx, ky)
Area and Perimeter of Similar Figures :
• If two polygons are similar with lengths
of the corresponding sides in the ratio
a : b, then the ratio of their perimeters
is a : b.
• If two polygons are similar with lengths
of the corresponding sides in the ratio
a : b, then the ratio of their areas is a2
: b2.
Similar and Congruent :
Similar Figures :Similar figures have the same angle measurements, but are not the same size.
Congruent Figures :Congruent figures have the same angle measurements and the same side lengths. They are identical.
Parallel Lines Cut By A Transversal :
1 2 3 45 6 7 8
Parallel Lines Two lines that will never cross.
Transversal A line that cuts through two parallel lines.
Supplementary Angles
Angles with a sum of 180o. Examples : <7 and <8, <1 and <2
Interior anglesAngles along the transversal inside the parallel lines. Examples : Angles 2, 3, 6 and 7
Alternate anglesAngles on opposite sides of the transversal. Examples : <2 and <7 are alternate interior angles.
Corresponding Angles
Two angles that are in the same place, on different parallel lines. For example, <2 and <4 are corresponding angles.
Vertical anglesVertical angles share a vertex but not a side. Example : <3 and <8 are vertical angles.
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Translations
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Key Points :• When you translate an object, you slide it.
• An image that has been translated will be congruent to the original image.
• Images can be translated in two directions : left/right or up/down.
• A diagonal translation is a combination of a left/right and an up/down translation.
The given shape has
been translated four units
down.
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Reflections
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Key Points :• When you reflect an object, you flip it across an axis. • An image that has been reflected will be congruent
to the original image. • Images can be reflected in two directions : vertically
or horizontally. • Images can be reflected over an axis (x-axis or
y-axis) or over a certain point (x = 4 or y = -2).
The given shape has
been reflected across the
y-axis.Q
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Rotations
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Key Points :• When you rotate an object, you turn it around a point. • An image that has been rotated will be congruent to
the original image. • Images can be rotated in three different ways
clockwise or counterclockwise : 90o, 180o and 270o.• Images can be rotated around the origin or a given
point.
The given shape has
been rotated 90o
clockwise around the
origin.
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Dilations
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
Key Points :• A dilation is when you stretch or shrink an image on the
coordinate plane. • In order to dilate an image, you need a scale factor, or the
ratio of the size of the image to the size of the pre-image.
• To dilate a point, multiply the coordinates of the point by the scale factor to get the coordinates of the new point.
• To dilate a shape, multiply the coordinates of each vertex of the shape by the scale factor to the get coordinates for each
vertex in the new shape.
The given shape has
been dilated using
a scale factor of ½.
(0, 2) • ½ = (0, 1)(-4, 2) • ½ = (-2, 1)(-4, 4) • ½ = (-2, 2)
Missing Angles :• The sum of the interior angles
in a polygon can be found by multiplying 180 by the number
of sides, minus two, or 180(s –
2). • The sum of the exterior angles
of a polygon is always 360o.• The measurement of an
exterior angle in a regular polygon can be found by
dividing 360 by the number of sides the polygon has.
Missing Dimensions :
Finding the height : 1.Plug what you know into the
formula.• If given the diameter, find the
radius first. 2. Work backwards to solve for h.
Round to the nearest hundredth.• Use the pi symbol on your
calculator or 3.14 if you are solving by hand.
3. Check your answer.
Finding the radius: 1. Plug what you know into the
formula.2. Work backwards to solve for r.
Round to the nearest hundredth.• Use the pi symbol on your
calculator or 3.14 if you are solving by hand.
3. Check your answer.Volume Formulas :• Sphere
• Cylinder
• Cone
The Pythagorean Theorem :
• The Pythagorean Theorem is :
• The Distance Formula is :
(x2 − x1)2 +( y2 − y1)2
a2 +b2 = c2V = πr2h
V = 13πr2h
V = 43πr
3
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Geometry
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
The Pythagorean Theorem is :
The Distance Formula is :
(x2 − x1)2 +( y2 − y1)2
a2 +b2 = c2
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The Pythagorean Theorem
©2017 Lindsay Perro. All rights reserved. www.beyondtheworksheet.com
The Pythagorean Theorem states that in a right triangle, the square
of the long side (hypotenuse) is equal to the sum of the squares of the other two sides (the
legs).
A Missing Leg (a or b):• It doesn’t matter if you are missing a
or b when using the formula.
• For example : The hypotenuse
is 34 cm and one leg is 20 cm.
What is the measure of the
missing leg?
Missing Hypotenuse (c) :• For example :
A right triangle has
two legs that are 6 inches long. Find
the length of the missing side.
62 + 62 = c2
36 + 36 = c2
72 = c2
72 = c2
8.49 ≈ c
a2 + 202 = 342
a2 + 400 = 1,156a2 = 756
a2 = 756a ≈ 27.5
The Coordinate Plane : • To determine side lengths (or just the
distance between any two given
points) on the coordinate plane, use the distance formula.
• For example : Find the distance
from A to C.
A B
C
(2,6)(7,2)
(7 − 2)2 + (2 − 6)2
(5)2 + (−4)2
25 +16
416.4
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