In the construction of quadrilateral PQRS, with PQ = 3 cm, QR = 4 cm and PS = 5 cm, also, ∠SPQ = 70∘ and ∠PQR = 90∘, which of the sides is to be taken as base and constructed first?
PQ
The side which contains both the given angles on its ends is the side which is to be taken as the base of the quadrilateral and to be constructed first.
PQ is the side which contains both the angles ∠SPQ and ∠PQR, so PQ becomes the base.