Question

The radius of a circle is 9 cm . A central angle intercepts an arc that is 9 cm . What is the measure of the central angle in radians?

Answer 1

Answer: 1 radian

Explanation:

We use the formula
`s=\theta r`, where
`s` is the arc length,
`r` is the radius, and
`\theta` is the central angle.

`9=9\theta \implies \theta =1`