#include <bits/stdc++.h>

using namespace std;
#define int long long
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int T;cin>>T;
    for(int i=0;i<T;i++){
        int xa,ya,xb,yb,xc,yc,xd,yd;
        cin>>xa>>ya>>xb>>yb>>xc>>yc>>xd>>yd;
        int re1=(yb-ya)*(yd-yc);
        int re2=(xb-xa)*(xd-xc);
        if(re1==-re2){
            cout<<"Yes\n";
        }
        else cout<<"No\n";
    }
    return 0;
}