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r=10.5 A=_ Use 3.14 for pie How do I figure this(Thinking) out

Quote: Originally Posted by Erynn S r=10.5 A=_ Use 3.14 for pie How do I figure this(Thinking) out the formula for are of a circle is $\displaystyle A=\pi*r^2$ $\displaystyle \pi=3.1416$ $\displaystyle r^2=10.5^2 =110.25$ $\displaystyle A=3.1416*110.25$ $\displaystyle A=346.26$