Question

Please, guys, help me out.

Answer 1

Since the total sum of the measurement of a triangles internal angles are 180 degrees. You first have to subtract 180 - 83 - 39.
After that you will get R which is equal to T. Then you will find the answer

180 - 83 - 39 = angle R

Angle R = Angle T

The answer of 180 - 83 - 39 is T

Answer 2

First we need to calculate ∠R

Since ∠R is one of three angles of ΔRDJ, we have:

∠R + ∠D + ∠J = 180°

∠R = 180° - ∠D - ∠J

∠R = 180° - 83° - 39° = 58°

Since ΔRDJ ~ ΔTRB, we can con conclude that:

∠R = ∠T

Because ∠R = 58°

=> ∠T = 58°