Question

Find the area of triangle two sides of which are 16 cm and 12 cm and its perimeter is 42c
m

Answer 1

Answer:

Length of side 1 = 16 cm

Length of side 2 = 12 cm

Perimeter of triangle = 42 cm

Perimeter of triangle = a + b + c

                      42 cm  = 16 + 12 + c

                       42 cm = 28 + c

                     42 - 28 = c

                      14 cm = c

∴ Length of side 3 = 14 cm

∴ Area of triangle = 81.3 cm²