How to find the diameter of a circle with circumference?

Diameter of a circle is the largest chord that passes through the centre of the circle. The circumference of a circle is the distance around the boundary of the circle.

Answer: Diameter of a circle can be calculated by dividing the circumference by π.

Let's look into the relationship between circumference of a circle and its diameter.

Explanation:

Let the radius and the diameter of the circle be 'r' and 'd'.

Let the circumference be 'C'.

Circumference of a circle = 2 × pi × r   

⇒ C =  2πr

Diameter = 2 × radius

⇒ d = 2r

Thus, C = πd

⇒ d = C/π

Hence, the diameter of a circle can be calculated by dividing the circumference by π.