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The formula is: A = Pi x R-squared, where Pi is 3.1416 and R is Radius. In this case we can set it as A = 3.1416 x (6 x 6) = 3.1416 x 36 = 113.0976 sq in.
Area = pi R2 = 36 pi = 113.1 (rounded)
113.0973355 or 113.10 square units rounded to two decimal places.
equation: 6 to the power of 2 multiplied by pi (3.14159.....)

so, with pi rounded to 3.14 the answer would be:

113.04

* * * * *

Using a less rounded value of pi, it is 113.10 square units.
Area = pi*62 = 113.097 square units to 3 decimal places

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