#define pi 3.141592654
main()
{
int a, b, A;
double c;
printf("Lutfen ucgenin 1. kenar degerini giriniz :");
scanf("%d",&a);
printf("Lutfen ucgenin 2. kenar degerini giriniz :");
scanf("%d",&b);
printf("Lutfen 2 kenar arasindaki aci degerini giriniz :");
scanf("%d",&A);
c = sqrt(a*a+b*b-2*a*b*cos(A*pi/180));
printf("Ucgenin 3. kenar degeri :%f dir. \n",c);
getchar();
getchar();
return 0;
}