Triangle

#include <stdio.h>
#include<math.h>
float slope(int x1,int y1,int x2,int y2)
{
    int y=y2-y1;
    int x=x2-x1;
    if(x!=0)
    return y/x;
    return tan(90);
}
float distance(int x1,int y1,int x2, int y2)
{
    int x=x2-x1;
    int y=y2-y1;
    x=x*x;
    y=y*y;
    return x+y;
}
int main()
{
    int x[3],y[3];
    int i;
    float m[3],d[3]; // m-> slope array  d-> distance array
    printf("Enter the coordinates:");
    for(i=0;i<3;i++)
    {
        scanf("%d",x+i);
        scanf("%d",&y[i]);
    }
    m[0]=slope(x[0],y[0],x[1],y[1]);
    m[1]=slope(x[1],y[1],x[2],y[2]);
    m[2]=slope(x[0],y[0],x[2],y[2]);
    if(m[1]==m[2])
    {
        printf("Cannot form triangle !");
        return 0;
    }
    else{
        d[0]=distance(x[0],y[0],x[1],y[1]);
        d[1]=distance(x[1],y[1],x[2],y[2]);
        d[2]=distance(x[0],y[0],x[2],y[2]);
        if(d[0]==d[1] || d[0]==d[2]){
            if(d[1]==d[2])
            printf("Its Equilateral traingle ");
            else
                printf("Its isosceles Triangle");
        }
        if(d[0]==d[1]+d[2] || d[1]==d[0]+d[2] || d[2]==d[0]+d[1])
        printf (" Right angled triangle");
    }
    return 0;
}