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 (a,b,c,d)==(e,f,g,h): print("Yes"); continue
    if (a,b)==(e,f) or (c,d)==(g,h) or 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
    o = (e-a)/(m-a) if m!=a else (f-b)/(n-b)
    p = (g-c)/(m-c) if m!=c else (h-d)/(n-d)
    print("Yes" if 0<o<1 and abs(o-p)<1e-9 else "No")