Area of Irregular Shapes Objectives: I can calculate the area of irregular shapes. I can find the area of shapes that are partially covered.

Let’s Review Area and Perimeter of Regular Shapes! 10 cm 4 cm A = P = 5 in A = P = 9 cm 7 cm A = P =

Example: How to find the area of irregular shapes Find any unknown sides Divide the irregular shape into squares or rectangles Find the area of each square or rectangle Add the areas together to find the total area of the shape See next slide for example! 9cm 6cm 5cm 10cm

How to find the area of irregular shapes Find any unknown sides Divide the irregular shape into squares or rectangles Find the area of each square or rectangle Add the areas together to find the total area of the shape 4 cm 16 + 50 = 66 (the sum of the area of the square and rectangle) Area = 66 square cm. A = l x w A = 4 x 4 A = 16 4 cm 9cm 6cm A = l x w A = 10 x 5 A = 50 5cm 10cm

Problem # 1 2m 7m 2m 4m 12m

Problem # 2 11cm 4cm 6cm 10cm 4cm 7cm

Problem # 3 Example Work out the area shaded in each of the following diagrams 6 cm 4 cm 2 cm 8 cm

This problem is not in your notebook! Extra Practice This problem is not in your notebook! 9m 7m 5m 5m 5m 34m

Find the Area of the Rectangle Problem # 4

This problem is not in your notebook! Extra Practice This problem is not in your notebook!

Left Side (Independent Practice) Create a triple T chart like the one below and solve. Irregular Shape Show Your Work Area