#include <iostream>
#include <math.h>

using namespace std;

int main(int argc, char **argv)
{
	int n;
	float x1, x2, x3, x4, y1, y2, y3, y4;
	
	cin >> n;
	for(int i = 0; i < n; i++){
		cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3 >> x4 >> y4;
		x2 -= x1;
		y2 -= y1;
		x4 -= x3;
		y4 -= y3;
		
		if((x2 < 0 && x4 > 0) || (x2 > 0 && x4 < 0) || (y2 < 0 && y4 > 0) || (y2 > 0 && y4 < 0)){
			cout << "NO" << endl;
			continue;
		}
		
		x1 = sqrt(((x2*x2)/(x2*x2+y2*y2)));
		x3 = sqrt(((x4*x4)/(x4*x4+y4*y4)));
		
		if(x1 == x3){
			cout << "YES" << endl;
		} else {
			cout << "NO" << endl;
		}
	}
	
	return 0;
}