#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;
#define REP(i,n) for(ll i=0;i<ll(n);i++)






const double EPS=1e-10;



int main(void){
	cin.tie(nullptr);  ios_base::sync_with_stdio(false);
	ll i,j;



	int T;
	cin >> T;
	while(T--){


		double ax,ay,bx,by,cx,cy;
		cin >> ax >> ay >> bx >> by >> cx >> cy;


		double a=acos(ax/sqrt(ax*ax+ay*ay));
		double b=acos(bx/sqrt(bx*bx+by*by));
		double c=acos(cx/sqrt(cx*cx+cy*cy));


		if(abs(a+b-c)<EPS) cout << "Yes" << endl;
		else cout << "No" << endl;








	}





	return 0;

}