T = int(input())

def solve(x1,y1,x2,y2,X1,Y1,X2,Y2):
    # 平行ならNo
    dx1 = X1-x1
    dx2 = X2-x2
    dy1 = Y1-y1
    dy2 = Y2-y2
    if dx1*dy2 - dx2*dy1 == 0:
        return False
    x2,y2,X1,Y1 = X1,Y1,x2,y2
    return (X1-x1)*(x2-x1-(X2-X1)) > 0 and (X1-x1)*((y2-y1) - (Y2-Y1)) == (Y1-y1)*((x2-x1) - (X2-X1))

for _ in range(T):
    x1,y1,x2,y2,X1,Y1,X2,Y2 = map(int,input().split())
    print("Yes" if solve(x1,y1,x2,y2,X1,Y1,X2,Y2) else "No")