#include <iostream>
using namespace std;

int main()
{
  double x1, x2, x3, x4, y1, y2, y3, y4;
  int n;

  cin >> n;

  for (int i = 0; i < n; i++){
    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
    if (x1 - x2 == x3 - x4 && y1 - y2 == y3 - y4){
      cout << "YES" << endl;
    }
    else {
      cout << "NO" << endl;
    }
  }

  return 0;
}