Are = pi R2 = pi (D/2)2 =
pi (36)2 = 1,296 pi = 4,071.504 square units (rounded)
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What aspect of the circle is 72? You will get a different answer depending on whether 72 refers to the diameter, circumference or area.
pi*72 and measured in square units
Area = pi*72 = 153.938 square meters
If its diameter is 14 then its area is: pi*72 = 153.938 square inches to three decimal places
Area = 3.14*72 = 153.86 square inches