The area of a circle is {pi} x radius2. 12 = 1, so:
a circle of radius 1 unit has an area of exactly pi units2
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The area of a circle is equal to pi times the radius squared. A 12 foot radius circle would have an area of exactly 144 pi square feet.
i think you do d x pi
No it does not exactly equal 3. Pi (that's how you spell it in math terms) exactly equals 3.14159265*just a note Pi does not in fact equal exactly 3.14159265 it is an irrational number therefor has no exact value although its decimal places will continue infinitely :)
area of a circle is equal to pi times the square of its radius.. A=(pi)r^2
Use the formula for the particular figure