153.94 square units.
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Area of a circle = (pi) x (radius)2 (pi) = about 3.1416 or about 22/7 . (It can never be written down exactly.) (radius)2 = (radius) x (radius)
153.94 units2
Area = 153.94 in2
Using 3.14 as Pi the area of circle is: 153.86
Use this formula: Pi * Radius squared In this case, the area is pi*72, which is about 153.9.