import math

t=int(input())
for _ in range(t):
    a1,b1,a2,b2,x1,y1,x2,y2=map(int, input().split())
    if a1==x1 and b1==y1 and a2==x2 and b2==y2:
        print('Yes')
        continue
    deg1=math.atan2(b2-b1, a2-a1)
    deg2=math.atan2(y2-y1, x2-x1)
    dis1=((b2-b1)**2+(a2-a1)**2)
    dis2=((y2-y1)**2+(x2-x1)**2)
    #print(deg1, deg2)
    if dis1>dis2 and deg1==deg2:
        print('Yes')
    else:
        print('No')