Question

The area of an equilateral triangle is \(36\sqrt{3}\ \text{cm}^2\). Its side is:

• A. \(6\) cm
• B. \(3\sqrt{3}\) cm
• C. \(12\) cm
• D. \(\sqrt{3}\) cm

Hint:

Memorize \(A_{\text{equi}}=\frac{\sqrt3}{4}a^2\).

Answer 1

The Correct Option is C

\(\dfrac{\sqrt{3}}{4}a^{2}=36\sqrt{3}\Rightarrow a^{2}=144\Rightarrow a=12\) cm.