Each equal side of an equilateral triangle is 12 cm . Find its area and its artitude. Share with your friends Share 1 Varun.Rawat answered this We have,length of the side of an equilateral ∆ = a = 12 cmArea of equilateral ∆ = 34a2 = 34 × 12 × 12 = 363 cm2Now, length of the altitude = 3a2 = 32 × 363 = 1082 = 54 cm 2 View Full Answer