Question

A circle has diameter of 22cm what is the radius

Answer 1

12cm, because radius is half of diameter

Answer 2

The radius is
`(1)/(2)` (half) the diameter.

Since you know the diameter = 22 cm,
`(1)/(2)` of 22 = 11. So the radius = 11 cm

You could also use equations: (d = diameter r = radius)

d = 2r --->
`r=(d)/(2)` And plug in what you know