Circle Area Circumference Terms Pi

What is the circle's radius?

• 5 cm

• 10 cm

• 20 cm

A DVD has a diameter of 15 millimeters. What is the circumference?

• c = 15π

• C = 2π15

• c = 15/π

• c = 15/2π

A hula hoop has a diameter of 3 feet. What is it's area?

• 18.85 ft²

• 9.42 ft²

• 28.26 ft²

• 7.07 ft²

What is the area of this circle?

• 50.24

• 78.23

• 98.12

• 201.06

Marisa purchases a pot for her father's garden. The diameter of the bottom of the pot is 18 cm. What is the area of the pot's bottom? (Round to the nearest whole number.)

• 28 cm²

• 57 cm²

• 254 cm²

• 1017 cm²

What is the radius of a circle when the diameter is 70 m?

• 38

• 35

• 90

• 140

Find the area of a circle with a diameter of 6 inches.

A circle has a radius of 9. What is it's area?

• 63.62

• 245.74

• 254.47

• 1017.88

what is the formula for finding the area of a circle, A = ?

• 2r

• πr2

• 2πr

Bob has a pool with a radius of 15 feet. what is it's area?

• 706.86

• 176.71

• 225

• 167.17