Question

The sides of the triangle are 12 cm, 16 cm & 20 cm. Find its area

Answer 1

Area of the triangle of sides 12,16,20 cm = 96cm

Answer 2

The area of the triangle is
$12 + 16 + 20 = 48 \\ \sqrt{48(48 - 12)(48 - 16)(48 - 20)} \\ = 1244.30$