Question

What is the circumference of a circle whose radius is 20 feet? Leave answer in terms of π.

a.10π feet
b.20π feet
c.40π feet
d.100π feet?

Answer 1

C) 40π feet

Explanation:

The formula for circumference is C = πd. Since the radius is 20 feet, the diameter is 40 feet, and the circumference is 40π feet.

Answer 2

circumfrence=2pir
2pi(20)
40pi
C