Question

What is the area of an equilateral triangle whose side is $\text{8 cm}$?

• A. 16√3cm²
• B. 16cm²
• C. 6√3cm²
• D. 16√5 cm²

Answer 1

The correct option is A

16√3cm²

Area of an equilateral triangle whose side is $\text{8 cm}$ $=\frac{\left(\sqrt{3}\right)}{4}{a}^2$ ${cm}^2$, where a $=\text{8 cm}$
$=\frac{\left(\sqrt{3}\right)}{4}$ $\times$ $8^2$ ${cm}^2$
$=\frac{\left(\sqrt{3}\right)}{4}$ $\times 64$ ${cm}^2$
$=16\sqrt{3}{cm}^2$