Question

Find the semi perimeter of a triangle whose sides are 8cm,11cm and 21cm

Answer 1

Step-by-step explanation:

perimeter of traingle= a+b+c

therefore,, semi perimeter= a+b+c/2

here,, a= 8 cm, b=11cm, c=21cm

so,, semi perimeter= 8+11+21/2

= 40/2

=20

hope this helps;)