#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

double slope(double x1, double y1, double x2, double y2){
    return (y2-y1)/(x2-x1);
}

int main() {
    int n;
    cin >> n;
    while(n--){
        double a1,a2,b1,b2,c1,c2,d1,d2;
        cin >> a1 >> a2 >> b1 >> b2 >> c1 >> c2 >> d1 >> d2;
        int flag = 0;
        if(slope(a1,a2,b1,b2) == slope(c1,c2,d1,d2) || slope(a1,a2,b1,b2) == -slope(c1,c2,d1,d2)) flag = 1;
        if(slope(a1,a2,c1,c2) == slope(b1,b2,d1,d2) || slope(a1,a2,c1,c2) == -slope(b1,b2,d1,d2)) flag = 1;
        if(slope(a1,a2,d1,d2) == slope(c1,c2,b1,b2) || slope(a1,a2,d1,d2) == -slope(c1,c2,b1,b2)) flag = 1;
        if(flag) cout << "NO" << endl;
        else{cout << "YES" << endl;}
    }
    return 0;
}