Learn how to calculate the circumference of a circle using radius or diameter, and see the derivation of the formula . Find solved examples and practice problems with answers. What is the formula for the circumference of a circle ? The circumference (C) of a circle is the distance around it. It's calculated using either C = 2πr (where 'r' is the radius) or C = πd (where 'd' is the diameter). 2. Master the circumference of a circle -get formulas , solved examples, and key tips with Vedantu. Learn fast and boost your math skills! Circle formulas are basic formulas used in geometry to solve various problems of circles and are used in solving various mathematical and other problems. Before moving with various circle formulas one must familiarise with the basic definition of a circle . "A circle is a basic geometrical shape in which all points on the circumference of the circle are equidistant from the centre of the circle ." In this article, we will learn about various circle formulas their uses and others in detail.
