#include<stdio.h>

#include<conio.h>

main()

{

int x,y,z,sum=0;

clrscr();

printf("\n enter the angles x,y and z");

scanf("\n %d%d%d",&x,&y,&z);

sum=x+y+z;

if(sum==180)

{

printf("\n triangle is valid sum=%d",sum);

}

else

{

printf("\n triangle is not valid sum=%d",sum);

}

return (0);

}

output:-

enter value of x=50

enter value of y=60

enter value of z=70

triangle is valid sum=180