Question

Pls tell me the step by step explanation of this : ​

Answer 1

may be the answer is d. 140°

Answer 2

Answer:

in triangle PQR, angle p+ angle q +angle r=180

= 60+50+Q=180

=110+Q=180

Q=180-110

=70

QS is the bisector of angle PQR

70/2=35

now in triangle PQS

angle P +angle PQS+angle PSQ=180

60+35+anglePSQ= 180

95+angle PSQ=180

angle PSQ=180-95

angle PSQ=85

therefore 2anglePSQ = 2*85

= 170