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Q: What is the radius with a circle with a diameter of 18cm?

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The diameter is always double the radius so in this case, it is 18cm

Using 3.14 as Pi the area of circle is: 1017.36

Diameter of circle = 2 * Radius of the circle.

18 pi cm

Since diameter is twice its radius, the radius of this circle would be 60

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The diameter is always double the radius so in this case, it is 18cm

radius = 18/2 = 9 cm

Using 3.14 as Pi the area of circle is: 1017.36

1,017.9 cm2

The general equation for the area of a circle is π*r2, where r is the radius of the circle, and π is pi, which is approximately 3.14159. The diameter of a circle is how far it is from one side of the circle to the other, and the radius is how far it is the from edge to the center, thus the radius is half the diameter. Therefore the area is π*(92) ~ 254.47

A = 254.47 cm2

The radius of a circle is half the diameter so if the radius of a circle is r, then the diameter is 2r.

The diameter of a circle is twice its radius

Diameter of circle = 2 * Radius of the circle.

The radius of a circle is half of the diameter, so the radius of a circle with a diameter of 14in is 7in.

The radius of a circle is always half of the diameter. If the diameter is 85.4, the radius is 42.7.

18 pi cm

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