public static void Run()
{
int T = int.Parse(Console.ReadLine());
for (int i = 0; i < T; i++)
{
Point a = Point.ReadFromConsole();
Point b = Point.ReadFromConsole();
Point c = Point.ReadFromConsole();
Point d = Point.ReadFromConsole();
Point abVector = a.Subtract(b);
Point acVector = a.Subtract(c);
Point adVector = a.Subtract(d);
Point normalVector = abVector.CrossProduct(acVector);
int crossProduct = normalVector.DotProduct(adVector);
Console.WriteLine(crossProduct == 0 ? "YES" : "NO");
}
}
