In a quadrilateral PQRS, PQ = 3 cm, QR = 4 cm and PS = 5 cm. Also, ∠SPQ = 70∘ and ∠PQR = 90∘. Which of the following options is the approximate value of ∠QRS?
Step 1: Draw PQ = 3 cm.
Step 2: At Q, draw an angle of 90∘ and mark 4 cm along this angle as point R.
Step 3: At P, draw an angle of 70∘ and mark 5 cm along this line as point S.
Step 4: Join points P and S. Join points R and S. Quadrilateral PQRS is complete.
Step 5: Measure ∠QRS. It is approximately equal to 118∘.