Question

I don't understand this question, picture attached.

Answer 1

We can find this using the formula for arc length (where $r$ is the radius of the circle and $\theta$ is the central angle in radians):

$\textrm{Arc Length} = r\theta$

In our problem, we are given $12 = 8\theta$. This means that:

$\theta = \dfrac{12}{8} = \boxed{\frac{3}{2}}$

The measure of the angle is 1.5.