Question

circumference of circle

Answer 1

circumference of circle is nothing but its perimeter only.
Its formula is 2 pie radius.

Answer 2

$\huge\underline\mathfrak\color{blue}Answer$

To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).