#include#includemain{int a,b,c;int p,s;scanf("%d%d%d",&a,&b,&c);p=(a+b+c)/2;if (a+b>c && a+c>b& & b+c>a){s=sqrt(p*(p-a)*(p-b)*(p-c));printf("The area of a triangle is%d",s);}elseprint("Three edges do ...