Question

Find the area Of an equilateral triangle of side 20.

Answer 1

area of equilateral triangle =√3/4 side x side = √3/4 x400= 100√3 cm^2 appx.= 173.2

Answer 2

ar. of equilateral triangle = √3a^2/4
=√3(20)^2/4
=400√3/4
=100√3 sq.units