If the side of an equilateral triangle is 8 cm, then the area of the triangle (correct to two decimals places).
Answer & explanation
Correct answer: option 3
We know that,
Area of a equilateral triangle = \(\frac{\sqrt {3}}{4}\) × (side)2
Side = 8cm
Area of a equilateral triangle = \(\frac{\sqrt {3}}{4}\) × (8)2
= \(\frac{\sqrt {3}}{4}\) × 64 = 27.71 cm2