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The formula for it is:
 \pi  r^{2}
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No, the radius of the circle must be multiplied by itself, then multiply it by the pi, which is 3.14.
which means if my radius is 5, then the area is 78.50?
That's right. Don't forget to use the unit along with squared symbol (^2).
because only area and perimeter have exponents
It just multiplied the 3.14

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