A circle with circumference / blue{20}20start color #6495ed, 20, end color #6495ed has an arc with a 72^/circ72 ∘ 72, degrees central angle. What is the length of the arc?

Length of Arc = 4

Step-by-step explanation:

Circumference is the whole circle's perimeter.

Arc length is a "part" of the circumference.

Whole circle is 360 degrees, so the arc length with a central angle of 72 degrees will be:

72/360 = 1/5th of the whole circle

The whole circle has circumference of "20", so 1/5 th of that would be:

(1/5) * 20 = 4

Length of Arc = 4

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