for _ in range(int(input())):
    a,b,c,d,e,f,g,h = map(int,input().split())
    i,j,k,l = e-a,f-b,g-c,h-d
    if i*l==j*k: print("No"); continue
    m = a+(l*(c-a)-k*(d-b))/(i*l-j*k)*i
    n = b+(l*(c-a)-k*(d-b))/(i*l-j*k)*j
    if m!=a: print("Yes" if abs((e-a)/(m-a)-(g-c)/(m-c))<1e-9 else "No")
    else: print("Yes" if abs((f-b)/(n-b)-(h-d)/(n-d))<1e-9 else "No")