Circumference Quiz

Calculate the circumference of a circle with a radius of 5 cm.

• 15.71 cm

• 31.42 cm

• 25.13 cm

• 10.5 cm

Find the circumference of a circle with a diameter of 12 cm.

• 37.68 cm

• 24.56 cm

• 10.26 cm

• 15.72 cm

Using the formula 2πr, calculate the circumference of a circle with a radius of 8 cm.

• 10π cm or approximately 31.42 cm

• 4π cm or approximately 12.56 cm

• 32π cm or approximately 100.48 cm

• 16π cm or approximately 50.24 cm

What is the circumference of a circle with a radius of 10 cm?

• 20 cm

• 62.83 cm

• 78.54 cm

• 45.36 cm

If the circumference of a circle is 18π cm, what is the radius of the circle?

• 9 cm

• 15 cm

• 12 cm

• 6 cm

The circumference of a circle is 36π cm. What is the radius of the circle?

• 12 cm

• 30 cm

• 24 cm

• 18 cm

Solve the word problem: A circular garden has a circumference of 50 meters. What is the radius of the garden?

• 7.96 meters

• 40 meters

• 12.5 meters

• 25 meters

A bicycle wheel has a circumference of 132 cm. What is the radius of the wheel?

• 50 cm

• 100 cm

• 75 cm

• 21 cm

Convert the circumference of a circle with a diameter of 14 cm to its diameter.

• 7 cm

• 10.5 cm

• 3.14 cm

• 4.45 cm

If the circumference of a circle is 30 cm, what is its diameter?

• 20 cm

• 25 cm

• 15 cm

• 9.549 cm