Question

find the semi perimeter of a triangle whose sides are 18cm ,12cm, 15 cm​

Answer 1

Answer:

Semiperimeter, S=18 cm

Let the side of the triangle be a,b,c such that

a=16 cm, b=14 cm

S=

2

a+b+c

=

2

16+14+c

18=

2

30+c

c=36−30=6 cm

Therefore, third side of triangle is 6 cm.