Diameter implies circle
Divide diameter by two
square it.
Multiply it by pi (3.14159...)
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Circumference= 3.14 x Diameter Area of circle= 3.14 x diameter x diameter
Area = Pi(d/2)2 where d = diameter
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
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radius = diameter/2 area of a circle in square units = pi*radius2