Question

Find the area of the equilateral triangle of side 3√3 cm. 
1. 27√3 cm2
2. (27√3)/2 cm2
3. (27√3)/4 cm2
4. √3/4 cm2

Answer 1

Correct Answer - Option 3 : (27√3)/4 cm2

Given:

Side of equilateral triangle = 3√3 cm.

Formula used:

Area of equilateral triangle = √3/4 × (side)²

Calculation:

∴ Area of given equilateral triangle = √3/4 × (3√3)²

= (27√3)/4 cm²