calculate the height and subsequently the area of an equilateral triangle with a perimeter of 45 cm
Area =Sqrt(3) / 4 * S^2
A = 1.732/4 * 15^2
A =97.428 Cm^2
97.428 = [Base x Height]/2
97.428 =[15 x H]/2
H = ~ 13 Cm.
Ht = ( 7.5)sqrt(3) cm
Area = (1/2)base * Ht = (7.5) * ( 7.5)sqrt (3) ≈ 97.43 cm^2
