Question

1. write the formula for finding the circumference of a circle.

Explanation:

The circumference of a circle can be calculated using two formulas. One is based on the radius \(r\) of the circle, and the other is based on the diameter \(d\) of the circle. The constant \(\pi\) (pi) is a fundamental part of these formulas.

Answer:

The formulas for the circumference \(C\) of a circle are \(C = 2\pi r\) (where \(r\) is the radius) and \(C=\pi d\) (where \(d\) is the diameter).