Question

Find the circumference of a circle that has a diameter of 4 m..

Answer 1

If diameter = 4,

then radius = 4/2 = 2m.

Formula for the Circumference of a Circle = 2$\pi$r

2$\pi$r = 2 x 22/7 x 2

2 x 22/7 x 2 = 4 x 22/7 = 88/7

= 12.5714286 cm.

It can be also be rounded up into 12.6 cm.

So, the Circumference of the Circle is 12.6 cm or 12.5714286 cm.