Question

the side of a tringle are 16 cm.12cm and 20cm.find the area

Answer 1

We will solve it by Heron's formula.
Perimeter= 48cm
Semi-perimeter(s)= 48/2= 24cm
By Heron's formula,
Area of triangle=
$\sqrt{s(s - a)(s - b)(s - c)}$

$\sqrt{24(24 - 16)(24 - 12)(24 - 20)}$
$\sqrt{24 \times 8 \times 12 \times 4}$
= 96 cm²