Question

If a circle has a radius of 6cm, what is the diameter? Show how you know.

Answer 1

12

Explanation:

It's double the radius.

Answer 2

d = 12cm

Explanation:

d=2r = 2·6 = 12cm

Maths keeps one mentally active. The circumference = 2*(pi)*r = 6 cm. Therefore r, the radius = 6 *7/(2*22) = 42/44 = 0.954 cm.