Question

area of triangle formula​

Answer 1

1/2 × b × h..........b for base and h for height

or

√s(s-a)(s-b)(s-c)........s symbolises half perimeter

and a,b,c are sides of triangle

Both are applicable

Answer 2

$\Large \tt Area \: \: of \: \: ∆ \: \: = \: \: \frac{1}{2} \times b \times h$

$\Large \tt Area \: \: of \: \: Equilateral \: \: ∆ \: \: = \frac{ \sqrt{3} }{4} \times {a}^{2}$