import sys

def main():
    data = sys.stdin.read().split()
    ints = []
    for tok in data:
        try:
            ints.append(int(tok))
        except ValueError:
            # skip non-integer tokens, e.g. "CASE"
            continue

    if not ints:
        return

    T = ints[0]
    out = []
    idx = 1
    for _ in range(T):
        Ax, Ay, Bx, By, Cx, Cy = ints[idx:idx+6]
        idx += 6

        # tan(α + β) = (tan α + tan β) / (1 - tan α tan β)
        # Let tan α = Ay/Ax, tan β = By/Bx.
        # Numerator a = Ay*Bx + Ax*By
        # Denominator b = Ax*Bx - Ay*By
        # We want tan(α+β) == Cy/Cx  <=>  a/b == Cy/Cx
        # Cross-multiply (be careful if b==0 or Cx==0; this formula still works):
        a = Ay * Bx + Ax * By
        b = Ax * Bx - Ay * By

        # Check a * Cx == b * Cy
        if a * Cx == b * Cy:
            out.append("Yes")
        else:
            out.append("No")

    sys.stdout.write("\n".join(out))

if __name__ == "__main__":
    main()