#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

void yn (bool f) {
    if (f) std::cout << "Yes" << '\n';
    else std::cout << "No" << '\n';
}

int main()
{
    int test;
    cin >> test;
    long double ep = 1e-9;
    while (test--) {
        ll ax, ay, bx, by, cx, cy;
        cin >> ax >> ay >> bx >> by >> cx >> cy;
        yn(abs(atan2(ay, ax) + atan2(by, bx) - atan2(cy, cx)) < ep);
    }
}