Question

for an equilateral triangle,if s=21, find its side
​

Answer 1

Answer:

Given, s =21

Or, (a+b+c)/2 =21

Or, (a+a+a)/2 =21 (because equilateral)

Or, 3a/2 =21

Or, 3a =21×2

Or, a = 42/3 = 14.

Thus, a = b= c = 14