13) Complete the proof. Given: A RST, RT > ST Prove: measure of angle RST > measure of angle R

Proof: Since RT > ST, there exists a point Q on RT, where QT is the same length as ST. By the Isosceles Triangle Theorem, angle 2 is congruent to angle 3, and by definition of congruent angles, the measure of angle 2 = the measure of angle 3.​