A perimeter of a circle or ellipse is known as circumference. The definition of perimeter in mathematics can be defined as a path that circumscribe a two-dimensional shape. The term perimeter may be used either for the path, or its length—in one dimension. It can be thought of as the length of the outline of a shape. Perimeter of each shape is calculated in geometry using different equations. Here we show how to calculate the perimeter of a circle using geometric equations.

How do we find the perimeter of a circle?

Learn that the perimeter of a circle has its own special name, called "circumference." The symbol is a capital C. It is calculated using the formula:

Pi x diameter, or 3.14 x d = C. 

It can also be calculated by Pi x (2 x radius) = C or 3.14 x (2 x r) = C.

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