Question

find the area of an equilateral triangle whose side is 4 cm

Answer 1

Hi ,

Let the side of an equilateral triangle

= a = 4 cm

Area = A = ( √3/4 ) × a²

A = ( √3/4 ) × 4²

A = ( √3 × 4 × 4 ) / 4

A = 4√3 square cm

I hope this helps you.

:)

Answer 2

Hey!

We know,
Area = ( √3/4 ) × side²
        = ( √3/4 ) × 4²
        = ( √3 × 4 × 4 ) / 4
        = 4√3 cm²