Question

What will be the area of an equilateral triangle of side 30 cm?

Answer 1

Side of the equilateral triangle is 30 cm.
Area of an equilateral triangle = $\frac{\sqrt{3}}{4}{\left(\mathrm{side}\right)}^2$
= $\frac{\sqrt{3}}{4}$ × 30 cm ×30 cm
= 225$\sqrt{3}$ sq cm
∴ The area of the equilateral triangle is 225$\sqrt{3}$ sq cm.