T = int(input())

def solve(x1,y1,x2,y2,X1,Y1,X2,Y2):
    if (x1,y1)==(X1,Y1) and (x2,y2)==(X2,Y2):return True
    # 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
    return (x2-x1)*(dx1-dx2) >= 0 and (y2-y1)*(dy1-dy2) >= 0 and (x2-x1)*(dy1-dy2) == (y2-y1)*(dx1-dx2)

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")