Question

How would I do this problem? The measure of angle S = 30 degrees, the measure or arc RS = 84 degrees, and RU is tangent to the circle at R. Find the measure of angle U.

Answer 1

some properties to recall:

an angle ON the edge is half the arc;

an angle outside the circle is half the difference of the arcs

Answer 2

Is it 12?

Answer 3

yes

Answer 4

Yay!