#include <stdio.h>

int main () {
  int t = 0;
  long long x1 = 0LL;
  long long y1 = 0LL;
  long long x2 = 0LL;
  long long y2 = 0LL;
  
  int res = 0;
  
  res = scanf("%d", &t);
  while (t > 0) {
    long long ax = 0LL;
    long long ay = 0LL;
    long long bx = 0LL;
    long long by = 0LL;
    res = scanf("%lld", &x1);
    res = scanf("%lld", &y1);
    res = scanf("%lld", &x2);
    res = scanf("%lld", &y2);
    ax = x2-x1;
    ay = y2-y1;
    res = scanf("%lld", &x1);
    res = scanf("%lld", &y1);
    res = scanf("%lld", &x2);
    res = scanf("%lld", &y2);
    bx = x2-x1;
    by = y2-y1;
    if (ax*by == bx*ay && ax*ax+ay*ay > bx*bx+by*by) {
      printf("Yes\n");
    } else {
      printf("No\n");
    }
    t--;
  }
  
  return 0;
}