#include <cstdio>

using namespace std;

int main(void){
	int n, i;
	double x1,y1,x2,y2,x3,y3,x4,y4, vabx, vaby, vcdx, vcdy;
	scanf("%d",&n);
	for(i = 0;i < n;i++){
		scanf("%lf%lf%lf%lf%lf%lf%lf%lf",&x1,&y1,&x2,&y2,&x3,&y3,&x4,&y4);
		vabx = x1 - x2, vaby = y1 - y2;
		vcdx = x3 - x4, vcdy = y3 - y4;
		if((vabx == vcdx && vaby == vcdy) || (-vabx == vcdx && -vaby == vcdy)){
			printf("YES\n");
		}else{
			printf("NO\n");
		}
	}
	return 0;
}