Question

Circumference of a circle given the radius or diameter? explain why or why not

Answer 1

Circumference of a circle can be calculated if the radius or the diameter is given.

Explanation:

• Circumference or the perimeter of a circle can be calculated if the radius or the diameter of the circle is given.
• This is calculated by the formula -  2 * pi * r (if radius is given) and  pi * d (if diameter is given) where pi = 3.14, r = radius and d = diameter
• This calculation is based on the fact that the circumference is three and a little more times that of the radius. Since the diameter is double that of the radius, when the diameter is given formula becomes pi*d.