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

The circumference of the circle that has a radius of 20 feet is: C)  40π feet

Recall:

Given:

To find the circumference of the circle in terms of π, plug in the value of r into 2πr.

Circumference of circle = 2 × π × 20

Circumference of circle = 40π feet

Therefore, the circumference of the circle that has a radius of 20 feet is: C)  40π feet

Learn more about circumference of a circle on:

link

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noncoplanar points are points that do not lie on the same line.