Question

What is the formula of equilateral triangle .class-8​

Answer 1

Explanation:

The perimeter of an equilateral triangle is:

P = 3a (where a any length of the triangle)

The area of an equilateral triangle is:

`A = (√(3) )/(4) a^(2)` (where a is the side length)

Using the area formula we can rearrange it to get the formula of the length of the equilateral triangle:

`a = (2)/(3) 3^{(3)/(4) } √(A)`

Answer 2

• If side is s

Then three important formulas are

`\\ \rm\Rrightarrow Perimeter=3s`(As sides are equal)

`\\ \rm\Rrightarrow Area=(√(3))/(4)s^2`

`\\ \rm\Rrightarrow Height=(√(3)s)/(2)`