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- Perimeter of a Circle
The circumference of a circle is the perimeter of the circle. The circumference of a circle is the distance around the circle.
The circumference of a circle = πD
Where D is the diameter of the circle.
If r is the radius of the circle and D = 2r then
C = π × 2r
C = 2πr
Circumference which is also the perimeter of a circle
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