#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
void solve();
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int test_case;
  cin>>test_case;
  while (test_case--){
    solve();
  }
}
void solve(){
  int N;
  cin>>N;
  array<ll,2> S1,S2,G1,G2;
  cin>>S1[0]>>S1[1];
  cin>>S2[0]>>S2[1];
  cin>>G1[0]>>G1[1];
  cin>>G2[0]>>G2[1];
  if(S1==S2){
    cout<<(G1==G2?"Yes\n":"No\n");
    return;
  }
  if(S1==G1&&S2==G2){
    cout<<"Yes\n";
    return;
  }
  __int128_t a=(S1[0]-S2[0])*(G1[0]-G2[0])+(S1[1]-S2[1])*(G1[1]-G2[1]),
  l1=(S1[0]-S2[0])*(S1[0]-S2[0])+(S1[1]-S2[1])*(S1[1]-S2[1]),
  l2=(G1[0]-G2[0])*(G1[0]-G2[0])+(G1[1]-G2[1])*(G1[1]-G2[1]);
  if(a>=0&&a*a==l1*l2){
    cout<<(l1>l2?"Yes\n":"No\n");
  }else{
    cout<<"No\n";
  }
}