Question

find the area of triangle two side of which are 18 cm and 10 cm and the perimeter is 42cm

Answer 1

Perimeter of the triangle = 42 cm

First side of the triangle = 18 cm

Second side of the triangle = 10 cm

Third side of the triangle = ?

Sum of two sides = 18 + 10 cm
=28 cm

Third side = Perimeter - Sum of two sides
= 42 cm - 28 cm
= 14 cm

Third side = 14 cm