Question

find the area of triangle of its side 42cm,39cm,45cm

Answer 1

There is a direct formula to find the are of the triangle using length of sides.

$\sqrt{s(s - a)(s - b)(s - c)}$
where s=(a+b+c)/2
solve using this.
And let me know if u got the answer.

Answer 2

answer is756 I hope it will help you