Question

The height of an equalateral triangle measure 9√3cm.find its area

Answer 1

length of side will be a= 2h/√3

area is
a^2(√3/4) =81√3 cm^2

Answer 2

Height of an equilateral triangle = √3/2 *side
9√3 = √3/2 *side
side = 9√3 / √3/2 = 18 cm

Area of a equilateral triangle = √3/4 *side *side
                                              = √3/4 * 18 * 18
                                              = 104.29 cm²