Question

if the three sides of a triangle are of 20 cm each ,which formula you will use to calculate the area of the triangle also find the area of the required triangle ​

Answer 1

Answer:

Herons formula

Answer 2

In context to question asked,

We have to determine the area of triangle.

As per question,

it is given that,

Three sides of the triangle are 20 cm each.

As all the sides of triangle are equal, So, triangle will be equilateral triangle.

So, we will apply the formula of finding the area of equilateral triangle.

As we know that,

Area of equilateral triangle $=\frac{{\sqrt{3}}}{4}side^2$

So, putting the value of side in the above formula,

We will get,

$Area = =\frac{{\sqrt{3}}}{4}side^2\\=>Area =\frac{{\sqrt{3}}}{4}\times 20^2\:cm^2\\=>Area =\frac{{\sqrt{3}}}{4} \times 400 \:cm^2\\=>Area = 100{\sqrt{3}}\:cm^2$

Hence, value of area of equilateral triangle will be $100{\sqrt{3}}\:cm^2$