Thursday, March 1st • Please complete warm-upAnd take out homework (Composite figures)

Warm-UpSimplify

1. What is the are of a parallelogram that has a base of 56 and a height of 24.5.

2. What 3 D shapes has 12 edges?

Joke of the Day What candy do you eat

on the playground

?

“Recess” Pieces

- A three dimensional figure in which all the surfaces are _____________

A polyhedron that has two congruent, polygon shaped bases and other faces that are all ___________.

PyramidA polyhedron with a polygon base and

____________ sides that all meet at a common vertex.

Think, Pair, Share

• What is the difference between a base and face?

• How do you name prisms and pyramids?

• The area of a figure is the amount of

___________ it covers.

• We measure area in ________ units.

Which Area formula matches the shape?

2. a=lw

5. a=s²

4. a=bh

1. a=1/2 bh

3. a=πr²

Why does the Parallelogram Formula work?

You can divide any parallelogram into two congruent triangles.

So the area of each triangle is half the area of the parallelogram.

Base

HeightHeight

Base

Why Does The Triangle Work?

Whiteboard Review

Draw a

RADIUS

A line segment with one endpoint at the center of the

circle and the other endpoint on the circle is a radius (plural: radii). It is half the diameter

CenterRadius

Draw a

diameter

A diameter is a line segment that passes through the center of the circle and has both endpoints on the circle.

The length of the diameter is twice the length of the radius.

CenterRadius

Diameter

Draw a

circumference

The distance around a circle is called the circumference.

CenterRadius

Diameter

Circumference

What is Pi

The ratio of the circumference to the diameter, , is the same for any circle. This

ratio is represented by the Greek letter , which is read “pi.”

Cd

Cd

=

Pi

What is the formula for circumference?

The formula for the circumference of a circle is C = d, or C = 2r.

The decimal representation of pi starts with 3.14159265 . . . and goes on forever without repeating. We estimate pi using 3

What is the formula for area of a circle

A=πr²

What is the formula for a rectangle?

A=lw

What is the formula for a parallelogram

A=b x h

What is the formula for area of a triangle

A= ½ b x h

If a rectangle has a width of 10 in and a length of 7 in. What is the area?

70 in²

If a triangle has a height of 6 in. and a base of 4 in. What is

the area?

12 in²

Homework Answers

Task #1: Floor Plan DUE END OF DAY FRIDAY

Task #2: Interim study guide DUE MONDAY

Classwork

Composite ProjectTask #1 Answer questions 1-3 using the floor plan I gave you

Task #2 On a SEPARATE SHEET OF PAPER create your own floor plan! Your floor plan must create and find the AREA of at least 4 rooms, 1 square room, 1 rectangle room, and 1 triangle room!

Due Friday at the end of the day!