Circle Math Mastery Quiz

If the diameter of a circle is 10 cm, what is its radius?

• 5 cm

• 20 cm

• 10 cm

• 15 cm

Calculate the diameter of a circle whose radius is 7 meters.

• 3.5 meters

• 14 meters

• 21 meters

• 7 meters

• 25.12 inches

• 12.56 inches

• 8 inches

• 50.24 inches

• 28.26 cm

• 12.56 cm

• 50.24 cm

• 4 cm

• 5 meters

• 10 meters

• 15 meters

• 20 meters

• 62.8 feet

• 31.4 feet

• 94.2 feet

• 10 feet

If a bicycle wheel has a radius of 14 inches, what is the diameter of the wheel?

• 7 inches

• 28 inches

• 42 inches

• 14 inches

• 47.1 meters

• 94.2 meters

• 30 meters

• 60 meters

The diameter of a circular clock is 12 inches. What is the clock's radius?

• 6 inches

• 12 inches

• 24 inches

• 3 inches

• 20 cm

• 31.4 cm

• 10 cm

• 40 cm