Question

The difference between the semi perimeter and sides of a triangle ABC are 9cm 6cm 5cm find area of triangle ABC

Answer 1

given
s-a =9 cm
s-b =6 cm
s -c = 5 cm
s = 20/2 = 10 cm
area of triangle by herons
$\sqrt{s \: (s - a)(s - b)(s - c)}$
$\sqrt{10 \times 9 \times 6 \times 5}$
$30\sqrt{3} cm2$