CLASS-6
CIRCUMFERENCE OF A CIRCLE

CIRCUMFERENCE OF A CIRCLE -

The circumference (C) of a circle is given by the formula:

                C = 2πr

where π is a mathematical constant approximately equal to 3.14159, and r is the radius of the circle.

Alternatively, you can use the diameter (d) to find the circumference:

                C = πd

The relationship between the radius and diameter is d = 2r, so you can use either the radius or the diameter in the formulas.

The whole arc of the circle is called circumference of the circle.

The length of the circumference of a circle is the length of its whole arc. Usually, the term circumference of a circle refers to its length.