2018 · Q75
The sides of a triangle are 5 cm, 6 cm and 7 cm. The area of the triangle is approximately
Elementary MathematicsGeometry: Lines, Angles and Triangles
- A14.9 cm2\mathrm{cm}^2
- B14.7 cm2\mathrm{cm}^2
- C14.5 cm2\mathrm{cm}^2
- D14.3 cm2\mathrm{cm}^2
Explanation
With s = (5 + 6 + 7)/2 = 9, Heron's formula gives area = sqrt(9 x 4 x 3 x 2) = sqrt(216) approx 14.697. This is approximately 14.7 cm^2. Hence option B.