Question

If there is no height how to find area of triangle with 3 sides

Answer 1

s=a+b+c/2

heron's formula

area=

$\sqrt{(s(s - a)(s - b)(s - c))}$

Answer 2

we can find it by heoron's formula
it is
√s(s-a)(s-b)(s-c)
a is one side
b is second side
and
c is third side
and s is perimeter÷2