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What is the area of a circle when the diameter is known?

Updated: 4/28/2022

Wiki User

∙ 15y ago

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let d be the diameter of the circe. So the radius is d/2 or half the diameter by definition. The area of the circle is Pi x r^2 so it is Pi (d/2)^2 this is (Pix d^2)/4 SO the area is Pi times the diameter squared all divided by 4

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∙ 15y ago

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What is the diameter of a circle with a area of 37.68?

The diameter of a circle with an area of 37.68 is 6.92

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To find area of a circle using diameter, you use this formuler. Area=pi(diameter/2)(diameter/2)

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The diameter of a circle with an area of 37.68 is 6.92

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