Question

What is the length of the radius of the cirlce?

Answer 1

Remember the formula for arc length:

$L = r \theta$

• $r$ is the radius of the circle
• $\theta$ is the central angle

By substituting in values given, we can find $r$.

$r \dfrac{7 \pi } {10} = 33$

$r = \dfrac{330}{7 \pi} \approx 15$

The answer is choice B, 15 cm.