In a quadrilateral PQRS, angle P = 3 angle Q and angle R = 4 angle S. If angle Q = angle S, then find all the four angles. Pls help me with this question. Share with your friends Share 4 Yash Raj answered this Dear Student. We have ∠P=3∠Q∠R=4∠S∠Q=∠SBy angles sum property of a quadrilateral,∠P+∠Q+∠R+∠S=3603∠Q+∠S+4∠S+∠S=3603∠S+∠S+4∠S+∠S=3609∠S=360∠S=40∠Q=40∠R=160∠P=120So the four angles are 40°,40°,160°,120°. We hope that this answer solves your query. Regards. 6 View Full Answer