//Program to find area of triangle given its sides
#include<iostream.h>
#include<math.h>
int main()
{
float a,b,c,s;
cout<<"Side 1 = ";cin>>a;
cout<<"Side 2 = ";cin>>b;
cout<<"Side 3 = ";cin>>c;
s=(a+b+c)/2;
cout<<"Area = "<<sqrt(s*(s-a)*(s-b)*(s-c))<<endl;
cout<<"Perimeter = "<<a+b+c<<endl;
return 0;
}