Question

What is the formula for the circumference of a circle?

(a) C = 2πd

(b) C = 2πr

(c) C = 2πa

(d) C = 2πs

This question was addressed to me by my college director while I was bunking the class.

I'm obligated to ask this question of Perimeter and Area of a Circle in portion Area Related to Circles of Mathematics – Class 10

Answer 1

Correct choice is (b) C = 2πr

To explain I would say: The circumference of a circle (C) = 2πr.

Where C is the circumference of the circle and r is the radius of the given circle.

The value of π is taken as \(\frac {22}{7}\).