Question 34
Mensuration of Plane ShapesIn the diagram above, find PQ if the area of triangle PQR is 35cm2.
- A.7cm
- B.10cm
- C.14cm
- D.17cm
Show the answer and explanation
Answer: C (14cm)
Explanation
Use area = ½ab sin C with the 30° angle at P: ½ × PQ × 10 × ½ = 35. So 2.5 × PQ = 35 and PQ = 14cm.