7th grade 500 100 200 300 100 300 200 300 200 100 200 500 300 100 400 Writing Rules Scale Factors...

7th grade

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Writing Rules

Scale Factors

Vocabulary Terms

SF and Area

Similar Figures

Stretching & Shrinking

If you apply a scale factor of 5

to a rectangle, the sides will be ____

times longer.

Scale Factors for $100

Click here to check your answer

The sides will be 5 times

longer.

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If you apply a scale factor of 9 to a rectangle, the perimeter will

increase ____ times.Click here to check

your answer

The perimeter increases 9

times.

Back toJeopardy

Two triangles are similar. One triangle has a side of

5 cm and the corresponding side on the other triangle is 10 cm. What is the scale factor from small to

large?

The scale factor is two.

Back toJeopardy

The perimeter of one square is 36 in. The

perimeter of another square is 12 in. What is

the scale factor from the large to the small?

The scale factor is

Back toJeopardy

There are two squares. One has a sides of length 8 mm. The other has sides

of length of 6 mm. What is the scale factor from small to large? (Give your

answer as a fraction in lowest terms.)

Back toJeopardy

Similar Figures for $100

Are the two rules similar?

(x,y) and (2x,y+2)

The rules are NOT similar.

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Are the two rules similar?

(2x,2y+4) and (12x, 12y+12)

The two rules ARE similar.

Back toJeopardy

Are the two triangles similar?

The figures are similar and the SF is 1.5.

Back toJeopardy

Are the rectangles

similar?

3.516.2

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The figures are similar and

the SF is 3.

Which are similar to a 4 by 6 rectangle?

A, yes - SF is 0.5

B, yes - SF is 1.5

C, no Back to

Jeopardy Board

SF and Area for $100

If the scale factor is 4, the

area of the image will be ___

times larger.

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The area of the image will be 16

times larger.

If the area of Triangle A is 5 in2 and the

scale factor from A to B is 3, what is the area of Triangle B?

The area of triangle B is 45

Back toJeopardy

If the area of Rectangle A is 8 cm2 and the scale factor

from A to B is 2, what is the area of Rectangle B?Click here to check

your answer

The area of Rectangle B is 32 cm2.

Back toJeopardy

If the scale factor is 1.5, the

area of the image will be ___

times larger. Click here to check

your answer

The area will be 2.25 times

larger.

Back toJeopardy

If the area of Rectangle A is 16 m2 and the scale factor

from B to A

is , what is the area of Rectangle B?

The area of Rectangle B is 4

Back toJeopardy

Define perimeter.

Vocabulary Terms for $100

The distance around a figure.

Back toJeopardy

Define area.

The amount of space inside a

figure.

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Define scale factor.

The scale factor tells how many times larger or

smaller the image is compared to the original figure.Back to

Jeopardy Board

Define corresponding.

Corresponding angles or sides

are have the same position in similar figures.

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What three things make two figures

mathematically similar?

1. Same general shape.

2. Same corresponding angles.

3. Side lengths are increased by the same factor.

Back toJeopardy

Writing Rules for $100

Write a rule that will make the

sides of a figure three times

longer. Use (x,y) as the original

rule.Click here to check

your answer

(3x, 3y)

Back toJeopardy

Write a rule that will make the

figure twice as tall and six times as

wide. Use (x,y) as the original rule.

(6x, 2y)

Back toJeopardy

Write a rule that will move a figure to the right two

units. Use (x,y) as the original rule.

(x + 2, y)

Back toJeopardy

Write a rule that will make the sides of a

figure six times longer and moves the figure

up 2 units. Use (x,y) as the original rule.

(6x, 6y + 2)

Back toJeopardy

Write a rule that will increase the height two times, the width seven times, move to the left 4 units, and up 9 units.

Use (x,y) as the original rule.

(7x - 4, 2y + 9)

Back toJeopardy

7th grade 500 100 200 300 100 300 200 300 200 100 200 500 300 100 400 Writing Rules Scale Factors...

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