Question

formula of area of triangle​

Answer 1

Area of triangle = 1) ½× b × h

2) √ s(s-a) (s-b) (s-c)

[where s is semi perimeter.]

3) ½ ×(x1 (y2 -y3)+ x2(y3 - y1)+ x3(y1 -y2).(when coordinates of triangle are given)

4) Area of equilateral triangle = √3 /4 (side) ²

Answer 2

Area of triangle=( base * height)/2


Area of triangle(with sides)=√s(s-a)(s-b)(s-c),where s is the semi-perimeter and a,b and c are respective sides.


Area of equilateral triangle=
$\frac{ \sqrt{3} }{4} \times {a}^{2}$



Area of isoceles triangle=

$\frac{b}{4} \times \sqrt{4 {a}^{2} - {b}^{2} }$
Hope it helps;(