Question

If the Area of an equilateral triangle is 9√3 cm2 , then find its side.

Answer 1

Answer:

$\sf{Side=6cm}$

Step-by-step explanation:

$\textsf{Area of an Equilateral triangle }\sf{=\dfrac{\sqrt{3}}{4}\times Side^2}$

• Given Area of Equilateral Triangle = $\sf{9\sqrt{3}\:cm^2}$

$\to\sf{9\sqrt{3}\:cm^2}\sf{\:=\dfrac{\sqrt{3}}{4}\times Side^2}$

• Multiplying Both Sides by 4

$\to\sf{4\times9\sqrt{3}\:cm^2}\sf{\:=\sqrt{3}\times Side^2}$

$\to\sf{36\sqrt{3}\:cm^2}\sf{\:=\sqrt{3}\times Side^2}$

• Dividing Both Sides by $\sf{\sqrt{3}}$

$\to\sf{\dfrac{36\sqrt{3}\:cm^2}{\sqrt{3}}}\sf{\:=Side^2}$

$\to\sf{36 \:cm^2}\sf{\:=Side^2}$

• Taking Root on Both Sides

$\to\sf{\sqrt{36 \:cm^2}}\sf{\:=Side}$

$\to\sf{6\:cm}\sf{\:=Side}$

• Switch Sides

$\to\sf{Side=6cm}$