r = 1.38 cm
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Area of circle = pi x radius x radius where pi = 3.14159 If radius = 6 cm then Area = 3.14159 x 6 x 6 sq cm = 113.097 sq cm
Diameter = 12 cm so radius = 6 cm. Then area = pi*r2 = 36*pi = 113.1 cm2
Area = pi*radius squared
If it is a circle you are referring to the Area if the circle would be (pi)x(r^2) and the radius is 6 so the answer would be 36(pi)
113.0973355cm