Question

In an equilateral triangle of side $3\sqrt{3}cm,$ find the length of the altitude.

Answer 1

Given side of a equilateral triangle is $a=3\sqrt{3}cm$

As we know that

Length of altitude of equilateral triangle is $\frac{\sqrt{3}}{2}a$

$⟹$Length of altitude is $\frac{\sqrt{3}}{2}\times 3\sqrt{3}=\frac{9}{2}cm=4.5cm$