What's the formula for circumference of a circle?

Answer 1

Circumference of a circle is denoted as C in geometry. The formula to calculate circumference is:

C=2πr

where:

π = 22/7

r = radius

Note, radius is half of diameter (the line that touches two sides within circle and passes through the center of the circle)

Answer 2

C =2×PI×r ,,, PI=3.14

r= the circle radius

Answer 3

The formula to calculate circle is C=2xπ x r

π, also known as pie = 22/7 = 3.143

I hope, it helps.