In quadrilateral PQRS, ∠P:∠Q:∠R:∠S=3:4:6:7. Calculate each angle of the quadrilateral and then prove that PQ and SR are parallel to each other.

In quadrilateral PQRS, ∠P:∠Q:∠R:∠S=3:4:6:7. Calculate each ang

1.	In quadrilateral PQRS, ∠P:∠Q:∠R:∠S=3:4:6:7. Calculate each angle of the quadrilateral and then prove that PQ and SR are parallel to each other.
Answer» In quadrilateral PQRS, $∠ P : ∠ Q : ∠ R : ∠ S = 3 : 4 : 6 : 7.$ Calculate each angle of the quadrilateral and then prove that PQ and SR are parallel to each other.