Circle Geometry Quiz

What is the radius of a circle whose circumference is 3.27π?

• A) 1.635

• B) 3.27

• C) 6.54

• D) 0.8175

What is the circumference of a circle whose radius is 15?

• A) 30π

• B) 15π

• C) 45π

• D) 60π

What is the area of a circle whose circumference is 40π?

• A) 400π

• B) 200π

• C) 100π

• D) 800π

Express the area of a circle, in terms of π, whose radius is 7.5.

• A) 56.25π

• B) 15π

• C) 22.5π

• D) 30π

The diameter of a circle is 9. What is the area of the circle in terms of π?

• A) 20.25π

• B) 40.5π

• C) 81π

• D) 9π

What is the length of the radius of a circle whose area is 900π?

• A) 15

• B) 7.5

• C) 30

• D) 22.5

The area of a circle is 256π. What is the length of the diameter of the circle?

• A) 32

• B) 9

• C) 16

• D) 4.5

Find the length of an arc with a radius of 15 feet and an arc degree of 270 degrees.

• A) 67.5

• B) 135

• C) 101.25

• D) 202.5

What is the area of the sector with a central angle of 276 degrees and a radius of 10 feet? Use the formula A = (arc degree / 360) * π * r^2 and round to the nearest tenth.

• 240.7 square feet

• 250.8 square feet

• 260.9 square feet

• 270.0 square feet

What is the area of the sector with a central angle of 90 degrees and a radius of 9 feet? Use the formula A = (arc degree / 360) * π * r^2 and round to the nearest tenth.

• 63.6 square feet

• 70.7 square feet

• 75.8 square feet

• 80.9 square feet