from math import acos, degrees


T = int(input())
for _ in range(T):
    Ax, Ay, Bx, By, Cx, Cy = map(float, input().split())

    a = degrees(acos(Ax / (Ax ** 2 + Ay ** 2) ** 0.5))
    b = degrees(acos(Bx / (Bx ** 2 + By ** 2) ** 0.5))
    c = degrees(acos(Cx / (Cx ** 2 + Cy ** 2) ** 0.5))
    # print(a, b, c)

    print("Yes" if abs(a + b - c) < 1e-6 else "No")