The area of a circle is pi(radius)2
Radius is half the diameter.
Simply divide the diameter in half and enter it into the equation
3.14(diameter/2)2
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Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
Circumference= 3.14 x Diameter Area of circle= 3.14 x diameter x diameter
Diameter = circle's circumference/pi
A semicircle is 1/2 of a circle. Find the area with the diameter you are given as if you had a whole circle, then divide that answer by 2 to get the area of the semicircle.
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