Question

Find the area of a triangle in two sides are 13cm and 14 cm and perimeter is 42 cm

Answer 1

As another side is 15.
And it is a right angle triangle.
So its area is
$\frac{1}{2} \times height \times base = \frac{1}{2} \times 13 \times 14 = 91 \: square \: unit$