Area of Irregular Shapes and Rectangles

To find the area of a composite figure you must break the irregular figure into common shapes then find the area of each shape and 

• subtract them

• add them together

• multiply them

• divide them

Find the area of the composite figure

• 40

• 9

• 49

• 61

The diagram shows the spot on a basketball court called the “key”. What is the area of the key? Use 3.14 for ∏ .

• 284.52 ft2

• 228 ft2

• 317 ft2

• 116.71 ft2

What shapes create this composite figure?

• Rectangle and semi-circle

• Circle and rectangle

• 2 semi-circles and rectangle

• 2 rectangles and 1 circle

What is the method to find the area of composite shapes?

• Guess the area based on intuition without any calculations

• Use the perimeter of the shapes to determine the area

• Divide the shapes into smaller pieces and calculate the area of each piece separately

• Calculate the area of each individual shape and then combine them based on the overall shape (addition or subtraction).

Find the area of a composite shape made up of a rectangle with dimensions 4 cm by 6 cm and a triangle with base 5 cm and height 3 cm.

• 31.5 cm^2

• 15 cm^2

• 18 cm^2

• 24 cm^2

Solve.

• 102 m²

• 39 m²

• 51.2 m

• 81 m²

What is the area?

• 16 cm squared

• 36 cm squared

• 144 cm squared

• 72 cm squared

What is the area of this shape?

• 54 cm2

• 45 cm2

• 63 cm2

• 36 cm2

Find the area of the shape above

• 67

• 52 sq cm

• 67 sq cm

• 52 cm