import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
def mul(a, b):
    return (a[0] * b[0] - a[1] * b[1], a[1] * b[0] + a[0] * b[1])
def sign(x):
    if x > 0:
        return 1
    elif x < 0:
        return -1
    return 0
def dot(a, b):
    return a[0] * b[0] + a[1] * b[1]
def det(a, b):
    return a[0] * b[1] - a[1] * b[0]

for _ in range(ni()):
    que = na()
    a = (que[0], que[1])
    b = (que[2], que[3])
    c = (que[4], que[5])
    d = mul(a, b)
    if sign(dot(d, c)) == 1 and det(d, c) == 0:
        Yes()
    else:
        No()