def can_match():
    T = int(input())
    results = []
    for _ in range(T):
        x1, y1, x2, y2, X1, Y1, X2, Y2 = map(int, input().split())
        dist1 = ((x1-X1)**2 + (y1-Y1)**2)**0.5
        dist2 = ((x2-X2)**2 + (y2-Y2)**2)**0.5
        if abs(dist1 - dist2) < 1e-9 and (x1-x2)*(X1-X2) + (y1-y2)*(Y1-Y2) >= 0:
            results.append('Yes')
        else:
            results.append('No')
    for result in results:
        print(result)

can_match()