Area Review

What is the formula for circumference of a circle given the diameter?

• C = π r
• C = 2 π r
• C = π d
• C = 2 π d

If the circumference of a circle is 22 π ft, what is the radius?

• 22 ft
• 11ft
• π ft
• no ft

The _____ is the distance from the center to any point on the circle.

• diameter
• radius
• π
• center

The distance across a circle through its center is called the _____.

• diameter
• radius
• π
• center

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2
• Divide the diameter by 2
• Add 2 to the diameter
• Subtract 2 from the diameter

Find the area of the shaded region.

• 334 km²

• 172 km²

• 658 km²

• 433 km²

Find the area of the shape

• 16.56 sq in
• 7.14 sq in
• 10.28 sq in

Find the area of the composite figure

• 3
• 51.5
• 32
• 44

What is the area of the composite figure? (use 3.14 for pi)

• 14 cm²
• 6.28 cm²
• 12.56 cm²
• 20.28 cm²

Which number is not needed?

• 300 ft

• 19 ft

• 15 ft

• 24 ft