Question

What is the circumference of a circle with a diameter of 45 centimeters?

A. 282.7 centimeters
B. 70.7 centimeters
C. 6,361.7 centimeters
D. 141.4 centimeters

Answer 1

It is 141.4 centimetres. This is because the circumference is obtained by multiplying pi with the diameter.

Answer 2

Circumference, C = πd
d = diameter.

C = π*45

C = 45π

C ≈ 45*3.142

C≈ 141.39

C ≈ 141.4

Option D.