Question

A circle has an arc of length 56? that is intercepted by a central angle of 120. What is the radius of the circle?

Answer 1

r = 84

Explanation:

In order to solve this question, we need the formula for the arc length.

The correct formula is:

`(central-angle)/(360) * 2\pi r`

Plugging the numbers into this formula, we find that:

`(120)/(360)*2\pi r=56\pi`

`r=84`