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Q: If The exact area of a circle is 81pi square inches what are the radius and diameter of the circle explain?

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8 inches; the diameter of a circle is twice its radius.

The radius of a circle is one-half of the circle's diameter. So if the radius is 12 inches, the diameter is 24 inches.

The diameter is double the radius of a circle. So you get 5 inches for the diameter.

The diameter of any circle is twice its radius. A circle with a radius of 13 inches will have 2 x 13 = 26 inches for a diameter.

A circle 14 inches in diameter has a radius of 7 inches, and a circle having a radius of 7 inches has a diameter of 14 inches.

The diameter is essentially twice the radius, so therefore a circle with a radius of 54 inches has a diameter of 108 inches.

Two inches. The radius of a circle is 1/2 of the diameter.

The radius of a circle is half of the diameter! So, if the diameter was four inches, the radius would be two inches!

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.

its 4..... the radius of a circle is half of the diameter

The radius of any circle is half the diameter.

R=D/2. If the diameter of a circle is 18 inches, the radius is 9 inches. Radius = 1/2 diameter or 9"

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