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Subjects>Math>Geometry

What is the diameter of a circle that is 20 inches long?

Anonymous

∙ 13y ago

Updated: 4/28/2022

The diameter is the same as the length, so it is 20 inches. If you meant to say that the circumference was 20 inches, then divide by pi, which is 3.1416

20 / 3.1416 = 6.4 inches

Wiki User

∙ 13y ago

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The circumference of a circle if its diameter is 20 inches is: 62.83 inches (diameter x Pi = circumference).

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1256 inches ++ Another Answer ++ The formula for finding the Circumference of a circle is C = Pi x D where D is Diameter and Pi is 3.1416. The Radius of a circle is one-half of the Diameter, hence the Diameter of a circle with a 20-inch Radius is 40 inches. Using the formula above, multiply 40 x 3.1416 to find the Circumference: 40 x 3.1416 = 125.664 inches.

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