T=int(input())
p=998244353
def get_cos(Ax, Ay, Bx, By):
    b2 = Ax**2 + Ay**2
    c2 = Bx**2 + By**2
    a2 = (Ax - Bx)**2 + (Ay - By)**2
    r1 = 1
    if a2 - c2 - b2 < 0:
        r1 = -1
    r2 = (a2-c2-b2)**2 * pow(4*b2*c2,-1,p)%p
    return r1,r2

for _ in range(T):
    Ax,Ay,Bx,By,Cx,Cy = map(int, input().split())
    r1, r2 = get_cos(Ax, Ay, Bx, -By)
    r3, r4 = get_cos(1, 0, Cx, Cy)
    if r1 ==r3 and r2 == r4:
        print("Yes")
    else:
        print("No")