Question

what is the formula of area of traingle

Answer 1

1/2* base* height
For equilateral triangle root 3*side square

Answer 2

S(semiperimeter of yriangle) =(a+b+c) /2
Area =√{s(s-a) (s-b) (s-c)}
Here a b c are sides of triangle.
It works for all triangles.
Hope u got it.