Q. 3

# 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 :

∠P=100^{°} , ∠Q=80^{°} , ∠R=100^{°}

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