Question

If the measure of arc DEF is 248°, what is the measure of ∠DEF?

Numerical Answers Expected!

Answer 1

You know that a circle has 360 degrees, so you want the angle formed by DEF, so the exterior angle is 248. You need the interior, which is 360-248=112, now if it was the radi that made up DEF you would be done, however since it is not the radius but rather extends to the other end of the circle, you will need to divide by 2 so 112/2 should be the answer