Infinitely long prism is sliced
1. The problem statement, all variables and given/known data
What happens when an infinitely tall vertical rectangular prism consisting of all (x,y,z) with x between a and b and y between c and d is cut by a nonvertical plane z = px + qy + k? What are the possible shapes of the slice? 2. Relevant equations I don't know...no idea really 3. The attempt at a solution I think it would be a parallelogram, but I have no idea how to prove this. 
Re: Infinitely long prism is sliced
What class is this for?

Re: Infinitely long prism is sliced
Imagine viewing a rectangular piece of paper at some distance. All possible orientations of the paper except those you when you view the paper head on will give you the possible shapes you are looking for? It might help to pick up a playing card, drivers license, or credit card and hold it at arms length.

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