#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
using namespace std;
int main(){
	int n;
	double x1,y1,x2,y2,x3,y3,x4,y4;
	cin>>n;
	for(int i=0;i<n;i++){
		cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4;
		double a,b,c,d,e,f;
		a=sqrt(pow(x2-x1,2)+pow(y2-y1,2));
		c=sqrt(pow(x4-x3,2)+pow(y4-y3,2));
		b=abs(x1-x3);
		d=abs(x2-x4);
		e=abs(y1-y3);
		f=abs(y2-y4);
		b=b*e;
		d=d*f;
		if(a==c&&b==d){
			cout<<"YES"<<endl;
		}else{
			cout<<"NO"<<endl;
		}
	}
	return 0;
}