Area of Composite Figures

Calculating Area

How do we know which formula to use????

Example 1:

​1. Write the correct formula.

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2. Plug in the correct values.

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3. Solve!​

Example 2:

Example 3:

Example 4:

How is this different?

Finding the area of a semi-circle:

​1. Use the area of a circle formula.

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2. Divide the area by 2, since we only need HALF the circle.​

Let's try...

You try...

Multiple Choice

What is the area of this semi circle? 

• 100.5 square cm
• 25.1  square cm
• 50.3 square cm
• 12.6 square cm

Multiple Choice

What is the area of the parallelogram above?

• 13 cm²

• 28.5 cm²

• 45.6 cm²

• 40 cm²

Multiple Choice

What is the area of this trapezoid?

• 91 ft²

• 77 ft²

• 78 ft²

• 105 ft²

Multiple Choice

• 19.8 km²
• 37.8 km²
• 18.9 km²
• 35 km²