#include <bits/stdc++.h>
using namespace std;

int main(){
    int T;
    cin>>T;

    while(T--){
        pair<int,int> A,B,C;
        cin>>A.first>>A.second;
        cin>>B.first>>B.second;
        cin>>C.first>>C.second;
        if(atan2(A.second,A.first)+atan2(B.second,B.first)==atan2(C.second,C.first)){
            cout<<"Yes"<<endl;
        }else{
            cout<<"No"<<endl;
        }
    }
}