The circumference of a circle is calculated using the formula: circumference = π × diameter, which can be written as c = π d Or: circumference = 2 × π × radius, which can be written as c = 2 ...

The circumference of a circle is calculated using the formula: circumference = π × diameter For any circle: circumference ÷ diameter = 3.1412 This number is Pi (π).

Calculating Circumference Before we can calculate arc length, we must first understand how to calculate circumference, as well as the relationship between circumference and a circle's (or arc's) ...