2017 · Q60
What is the area of the triangle whose sides are 51 cm, 37 cm and 20 cm ?
Elementary MathematicsMensuration
- A300 square cm
- B305 square cm
- C306 square cm
- D307 square cm
Explanation
Semi-perimeter s = (51+37+20)/2 = 54. By Heron's formula: area = √(54×3×17×34) = √93636 = 306. Hence option (C) 306 square cm.