Question

one side of a equillateral triangle is 8 cm find its area what is its altitude​

Answer 1

Answer:

Semi perimeter = (8+8+8)/2 = 12 cm

By Heron' Formula

area = √[s(s-a)(s-b)(s-c)]

       =√[12×4×4×4]

       =16√3 cm²

As we know that, area = (1/2)×base×altitude

⇒16√3 = (1/2)×8×altitude

⇒altitude = 4√3 cm