Question

What is the measure of BOC I couldn’t figure this out.

Answer 1

The arc length formula is :

`\text{arc}=r\theta`

where r = radius and the angle is in radians

From the problem, the arc length is 21π units and the radius is 15 units.

Using the formula above :

`\begin{gathered} 21\pi=15\theta \\ \theta=(21\pi)/(15) \\ \theta=(7)/(5)\pi \end{gathered}`

ANSWER :

A.