Question

Find the area of an equilateral triangle whose sides are of 14cm each using Heron's formula

Answer 1

Answer:

49√3 cm³

Step-by-step explanation:

s = (14×3)/2 = 21 cm

∴A = √ s(s-a)³ = √{21×(21-14)³} cm³

                       =  √(21×7×7×7)   cm³

                       = 7×7√3 cm³

                       = 49 √3 cm³