#include <complex>
#include <iostream>
#define _USE_MATH_DEFINES
#include <cmath>
using namespace std;
int main() {
  int n;
  cin >> n;
  for (int i = 0; i < n; i++) {
    double x1, y1, x2, y2, x3, y3, x4, y4;
    cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
    complex<double> c1(x1, y1);
    complex<double> c2(x2, y2);
    complex<double> c3(x3, y3);
    complex<double> c4(x4, y4);
    double a = arg(c2 - c1) - arg(c4 - c3);
    cout << ((a == 0 || a == M_PI || a == -M_PI) ? "YES" : "NO") << endl;
  }
}