Question

The diameter of a circle is 18 in. Find the circumference
to the nearest tenth

Answer 1

The circumference is 56.55

Answer 2

Answer: C≈56.55in

Explanation

Using the formulas

C=2πr

d=2r

Solving forC

C=πd=π·18≈56.54867inC=2πr

d=2r

Solving forC

C=πd=π·18≈56.54867in