What is the primary rhetorical device used in this sentence to enhance the meaning and tone of the passage?
"let every nation know, whether it wishes us well or i'll, that we shall pay any friend, oppose any foe, in order to assure the survival and the success of liberty."

Testing for coplanarity can be done by  finding the point-plane distances of the points  , ...,   from the plane determined by   and checking if they are all zero, by using arbitrary number of   points  , ...,  . Two lines will not always share all planes, though. They can be coplanar on the same horizontal plane, for example, but not be on the same vertical plane.

In this problem, we can see that the line WY is obviously in both planes, and there won't be any additional points unless the planes are coincident. In this case, since W, X, Y and Z are not all coplanar, the planes don't coincide, so the answer is Line WY.

photography had emerged as an elite art pursued by a few creative individuals for a few wealthy patrons. but now, said bauldelaire, it was succumbing to "the great industrial madness of our times." it was becoming a mass production industry that catered to middle-class tastes, including a taste for gadgetry. the stereoscope, the first 3d imaging system, had turned looking at photographs into parlor entertainment. a "thousand hungry eyes were bending over the peepholes of the stereoscope as though they were the attic-windows of the infinite.