Area With Circles

What is the formula for finding the area of a semi-circle?

• A = π r²

• C = π r²

• A = 2 π r

Find the area of the shaded region.

• 70 cm²

• 12 cm²

• 82 cm²

• 57 cm²

Find the area of the composite figure.

• 2,720 m²

• 3,093 m²

• 1,680 m²

• 1,987.72 m²

The diagram below shows the dimensions of a new swimming pool. A cover is needed for the pool, what will be the approximate area of the cover?

• 720 ft squared

• 127.17 ft squared

• 592.83 ft squared

• 254.34 ft squared

Find the area of the composite figure.

• 95.13 units²

• 110.52 units²

• 68.13 units²

• 90.42 units²

What is/are the formula(s) to find the area of a circle?

• πr²

• 2πr

• √π

What is the area of a circle with the diameter of 10cm ?

• 66cm

• 78.5cm

• 66.5cm

• 10m

Find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

What is the area of this circle?
d = 8cm

• 16π

• 8π

• 4π

• 36π

Jesse used rope to stake a circular region in which to plant a garden. The diameter of the region is 20 inches. What is the approximate area of half of the garden?

• 31.4 in²

• 314 in²

• 157 in²

• 628 in²