Question

The diameter of a circle is 10 cm. Find the circumference \textit{to the nearest tenth}to the nearest tenth.

Answer 1

Answer: 31.4 cm

Explanation:

Diameter (d) = 10 cm
Radius (r) = 10/2 = 5 cm
Circumference = 2πr

Therefore,
= 2πr
= 2 * π * r
= 2 * 3.14 * 5
= 6.28 * 5
= 31.4

Circumference = 31.4 cm

Answer 2

Circumference = diameter x pi

Circumference = 10 cm x 3.14

Circumference = 31.4 cm