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You use the formula for the area of any circle:

Area = (pi) x (radius)2

and to find the radius to use in this formula, you remember that

Radius = 1/2 of the diameter.

A couple of additional helpful facts:

-- A convenient and quite accurate number to use for (pi) is 22/7 .

-- The correct spelling of "circle" is "c i r c l e".

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12y ago

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