Question

PQRS is a quadrilateral. PR and QS intersect each other at O. In which of the following cases, PQRS is a parallelogram?

A. ∠P = 100°, ∠Q = 80°, ∠R = 100° 

B. ∠P = 85°, ∠Q = 85°, ∠R = 95° 

C. PQ = 7 cm, QR = 7 cm, RS = 8 cm, SP = 8 cm 

D. OP = 6.5 cm, OQ = 6.5 cm, OR = 5.2 cm, OS = 5.2 cm

Answer 1

Option : (A)

∠P = 100°, ∠Q = 80°, ∠R = 100°