How to calculate the circumference

Circle - a geometric figure that is drawn on a plane. Is the circumference of the plurality of points that are equidistant from a given center. In order to calculate its length, you can apply multiple formulas.

You will need

• You will need the following values:
• R - length of radius of the circle;
• D - the length of the diameter of a circle;
• π is a constant (π = 3.14)

Instruction

1. Method 1. Let the plane of a circle. Its radius is equal to R. Then the length L of this circle is considered thus:
   L = 2nr.
   Example: the Radius of the circle R = 5 cm Then the length of circumference L = 2*3.14*5 = 31.4 cm
2. Method 2. Given a circle with diameter D. Then L is:
   L = πD.
   Example: the Diameter of a circle D = 10 cm Then L is calculated as:
   L = 3.14*10=31.4 cm