#include<iostream>
#include<algorithm>
#include<vector>
#include<stack>
#include<queue>
#include<cstdio>
#include<climits>
#include<cmath>
#include<cstring>
#include<string>
#include<complex>
#include<cfloat>
#include<cassert>

#define f first
#define s second
#define mp make_pair

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,c) for(__typeof((c).begin()) i=(c).begin(); i!=(c).end(); i++)
#define ALL(c) (c).begin(), (c).end()
#define EPS (1e-10)
using namespace std;

typedef unsigned int uint;
typedef long long ll;
typedef complex<double> P;

#define PI (3.1415926535)
#define EPS (1e-10)

bool eq(double a, double b){
  return abs(a-b) < EPS;
}

int main(){
  int n; cin>>n;
  while(n-->0){
    P p[4];
    REP(i,4) cin>>p[i].real()>>p[i].imag();
    P a,b;
    a = p[0] - p[1];
    b = p[2] - p[3];
    
    if(eq(arg(a),arg(b)) || eq(arg(a),arg(-b)))
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
      
  }
  
  return 0;
}