Area of Circles

What is the area of a circle that has a radius of 100 miles?

• 7,850 miles 

• 10,000 miles

• 31,400 miles

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

• 23.55 ft²

• 176.63 ft²

• 47.1 ft²

• 706.5 ft²

Find the area of the circle

• 43.96 units²

• 153.86 units²

• 87.82 units²

• 307.72 units²

find the area of the circle below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

Find the area of the circle with a radius of 3 cm.

• 8.76 cm²

• 18.52 cm²

• 21.90 cm²

• 28.26 cm²

Answer explanation

Use area of a circle formula: A =πr²

A = π⋅3²

A = 9π

A = 28.27 cm²

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express answer to the nearest tenth of a square inch.( Use Pi =3.14)

• 25.2 in²

• 28.5 in²

• 31.4 in²

• 38.2 in²

find the area of the circle with radius 3 cm below.

• 100 cm²

• 225 cm²

• 9 cm²

• 28.26 cm²

Which formula do you use to find the area of the circle?

• C=πd

• C =2π r

• A=π r²

• A = 2 π r

Tags

8.6A

8.7.A

Find the area of the circle.

• 56.52 in²

• 254.34 in²

• 1017.36 in²

• 113.04 in²