Area: Decomposing

Area: Decomposing

This week we have learned about...

Breaking down irregular figures to find the area of the whole shape.

Let's Review

Area

Multiple Choice

What is the formula for finding the area of a rectangle or square?

• $A=b\cdot h$

• $A=l\cdot w$

• $A=\frac{b\cdot h}{2}$

• $A=\frac{l\cdot w}{2}$

Multiple Choice

What is the formula for finding the area of a triangle?

• $A=b\cdot h$

• $A=l\cdot w$

• $A=\frac{b\cdot h}{2}$

• $A=\frac{l\cdot w}{2}$

Multiple Choice

What is the formula for finding the area of a parallelogram?

• $A=b\cdot h$

• $A=l\cdot w$

• $A=\frac{b\cdot h}{2}$

• $A=\frac{l\cdot w}{2}$

Multiple Choice

True or False:

When breaking down your shape, you must break it down to rectangles, triangles, and trapezoids

• True

• False

Multiple Choice

True or False:

When breaking down your shape, it is important to create the least amount of shapes.

• True

• False

Multiple Choice

True or False:

This shape is broken down correctly.

• True

• False

Multiple Choice

True or False:

This shape is broken down correctly.

• True

• False

Let's Review with Mr. Jay!

Look at the example from your notes!

Draw this shape

in your notebook.

Split your shape

& draw the smaller shapes on the side.

Let's break it down

Multiple Select

What numbers represent the length & the width of the rectangle?

Select all that appy.

• 5

• 4

• 7

• 8

• 3

Multiple Choice

What do you think the base of the triangle is?

• 5

• 3

• 7

• 8

• 4

Multiple Choice

What do you think the height of the triangle is?

• 5

• 3

• 7

• 8

• 4

Questions?

Let's keep practicing!

Multiple Choice

What is the area of the rectangle?

• 32

• 127.5

• 255

• 119

Multiple Choice

What is the height of the triangle?

• 7

• 5

• 15

• 8

Multiple Choice

What is the base of the triangle?

• 7

• 5

• 15

• 8

Questions?

Open Ended

How do you feel about decomposing shapes to find the area?