Question

if s=18 and a=7,b=8 .find c where a,b,c, are sides and s is semiperimeter

Answer 1

Answer:

as s=18

a=7 and b=8

as we know that s= a+b+c/2

18=7+8+c/2

7+8+c=36

15+C=36

C=36-15=11