# What is the area of the equilateral triangle that has a side of 10 km?

Mar 8, 2017

$= 43.3 K {M}^{2}$

#### Explanation:

Area of an Equilateral Triangle is $= \frac{\sqrt{3}}{4} \times {a}^{2}$ where $a =$Length of the side of the Triangle.

Therefore we can write

Area $= \frac{\sqrt{3}}{4} \times {\left(10\right)}^{2}$

$= \sqrt{3} \times \frac{100}{4}$

$= 25 \times \sqrt{3}$

$= 43.3 K {M}^{2}$