Question

Ray SU is an angle bisector of ∠RST. The measure of ∠TSU is 42°. What is the measure of ∠RSU?

90°
84°
42°
168°

Answer 1

The measure of RSU is 42.

Answer 2

RSU is also 42 because SU is the angle bisector so it divided RST in two equal halves.

Hope this helps :)