The circumference of a circle is the distance all around the edge of the circle. To find the circumference of a circle, you use the formula C equals 2 times pi times r, where pi is equal to 22 over 7 and r is the radius.
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To find the area of the circle pi*radius*squared and subtract the area of the figure inside
to find the circumference of any circle, times the diameter(d) by pi and you will get the answers.
Circumference ("perimeter") of a circle = (pi) x (diameter of the circle)
-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).
It means that if you take a circle and find its area, you must now find a square with the same area. We cannot square the circle.