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")
no = lambda :print("no");No = lambda :print("No")
#######################################################################
t = ni()

def sub(a, b):
    return (a[0] - b[0], a[1] - b[1])

def det(a, b):
    return a[0]*b[1] - a[1]*b[0]

def parallel(a, b, c, d):
    return det(sub(a, b), sub(c, d)) == 0

def norm(a):
    return a[0] ** 2 + a[1] ** 2

def dist(a, b):
    return norm(sub(a, b))

def dot(a, b):
    return a[0]*b[0] + a[1]*b[1]

for _ in range(t):
    a = na()
    p1, p2 = a[0:2], a[2:4]
    q1, q2 = a[4:6], a[6:8]
    if (parallel(p1, p2, q1, q2) and dist(p1, p2) > dist(q1, q2) and dot(sub(p1, p2), sub(q1, q2)) > 0) or (p1 == q1 and p2 == q2):
        Yes()
    else:
        No()