Question

the sides of an traingle is 15cm,16cm and 9cm then the semiperimeter is​

Answer 1

⠀⠀⠀$\huge\bold{Semiperimeter::}$⠀⠀⠀

$\tt\large\green\rightarrow$In geometry, the semiperimeter of a polygon is half its perimeter.

Here we have,

Perimeter = (15+16+9)cm=40cm

Semiperimeter = 20cm

Answer 2

Answer:

Semiperimeter=[a+b+c]/2

a=15 cm

b=16cm

c=9 cm

Semiperimeter=[15+16+9]/2

           =[31+9]/2

           =[40]/2

           =40/2

           20 cm

Semiperimeter os the triangle is 20 cm.

Step-by-step explanation:

Hope this helps.