Question

An equilateral triangle has side $2\sqrt{3}$ cm. The radius of its circumcircle will be:

• A. 2 cm
• B. $\sqrt{3}$ cm
• C. 3 cm
• D. 4 cm

Answer 1

The correct option is A 2 cm

The radius of the equilateral triangle when all the sides are same in length$=\frac{S}{\sqrt{3}}$

Where S is the length of a side of the triangle.

Side of the triangle$=2\sqrt{3}$

$\therefore Radius=\frac{2\sqrt{3}}{\sqrt{3}}=2$ cm.