What is the area (in m2, up to 1 place of decimal) of an equilateral triangular field of side 8.5 m?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 18.1.
Area of equilateral triangle = √3/4 a² (where a is the side of the equilateral triangle)
Area of triangle = (√3/4) × (8.5)²
⇒ (√3/4) 72.25
⇒ √3 × (18.06)
⇒ 18.1 √3