#include <iostream>
main(){int n,i,j;double x[4],y[4];std::cin>>n;for(i=0;i<n;i++){for(j=0;j<4;j++)std::cin>>x[j]>>y[j];if(y[0]-y[1]==y[2]-y[3]&&x[0]-x[1]==x[2]-x[3])std::cout<<"YES\n";else std::cout<<"NO\n";}}