4-11 Area Models Lesson

4-11 Area Models Lesson

How to Solve Irregular Shapes

• First, partition the shape into rectangles.

• Solve for the missing sides if needed.

• Find the area of each rectangle.

• Add the products to find the total area of the irregular shape.

Draw on your Board/Paper

• First, make a cut to split the shape into rectangles or squares.

• Find the area of each new shape.

• Use the formula for area.

• A = l x w

Fill in the Blanks

Find area for shape 1.

20 x 20 = ?

Fill in the Blanks

Find area for shape 2.

100 x 30 = ?

Fill in the Blanks

Add up the products.

20 x 20 = 400

100 x 30 = 3,000

3,000 + 400 = ?