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Q: The circle has a radius of 30 millimeters. What is the diameter of a circle in centimeters?

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Radius is one-half of the diameter of a circle. Therefore, the radius of an eight-inch diameter circle is four inches. The diameter of a circle is a straight line joining a point on the circumference through the centre to the 'opposite' point on the circumference.

If the diameter is 12 cm the radius is 6 cm.

20 millimeters

When you have the radius of a circle and you are trying to find the diameter, multiply the radius by two; the answer is the diameter. If you have the diameter and want to find the radius, divide the diameter by two; the answer will be the radius. The diameter is 54 centimeters.

6cm

Related questions

The diameter is 4.4 cm

Radius is one-half of the diameter of a circle. Therefore, the radius of an eight-inch diameter circle is four inches. The diameter of a circle is a straight line joining a point on the circumference through the centre to the 'opposite' point on the circumference.

The radius of a circle is half the length of the diameter, so if the diameter is 32 centimeters the radius is 16 centimeters.

Radius = 1/2 of diameter = 19 centimeters.

75.42

Radius = 1/2 of the diameter = 328/2 = 164 millimeters

If the diameter is 12 cm the radius is 6 cm.

The radius of a circle is half of the diameter, so if the diameter is 56cm the radius can only be 28cm.

Radius is half of the diameter

20 millimeters

20 mm. The diameter is always twice the radius.

50 centimeters

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