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

PQRS is a quadrilateral. PR and QS intersect each other at O. In which

1.	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» Since, the quadrilateral with opposite angles equal is a parallelogram.