The side of an equilateral triangle is 4 cm. What is its area?
Answer & explanation
Correct answer: option 4
The side of a equilateral triangle = 4 cm.
Area of a equilateral triangle = \(\frac{\sqrt {3}}{4}\) × (side)2
Area of a equilateral triangle = \(\frac{\sqrt {3}}{4}\) × (4)2
= \(\frac{\sqrt {3}}{4}\) × 16 = $4\sqrt{3}cm^2$