Calculating Radius from Circumference

What is the formula to calculate the radius when given the circumference of a circle?

• radius = circumference - (2 * π)

• radius = circumference * π

• radius = circumference / (2 * π)

• radius = circumference + (2 * π)

If the circumference of a circle is 31.4 cm, what is the radius?

• 7 cm

• 3 cm

• 5 cm

• 10 cm

A circle has a circumference of 62.8 m. What is the radius of the circle?

• 20 m

• 15 m

• 10 m

• 5 m

If the circumference of a circle is 18.84 in, what is the radius?

• 9

• 12

• 6

• 3

A circular garden has a circumference of 94.2 ft. What is the radius of the garden?

• 25 ft

• 20 ft

• 30 ft

• 15 ft

What is the radius of a circle with a circumference of 25.12 mm?

• The radius of the circle is 2 mm

• The radius of the circle is 10 mm

• The radius of the circle is 4 mm

• The radius of the circle is 6 mm

If the circumference of a circle is 37.68 cm, what is the radius?

• 8 cm

• 10 cm

• 6 cm

• 4 cm

A bicycle wheel has a circumference of 188.4 cm. What is the radius of the wheel?

• 50 cm

• 25 cm

• 40 cm

• 30 cm

What is the radius of a circle with a circumference of 56.52 m?

• The radius of the circle is 12.34 m

• The radius of the circle is 8.99 m

• The radius of the circle is 10.11 m

• The radius of the circle is 6.78 m

If the circumference of a circle is 84.78 in, what is the radius?

• 20.5 in

• 10.5 in

• 16.5 in

• 13.5 in