an annoying textbook question

Endria

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Joined
Aug 27, 2005
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Someone help me with this?

Think of a classroom as a model of six planes. The floor and ceiling are models of horizontal planes A and B, and the four walls are models of vertical planes C, D, E, and F. Think of the classroom as a model.


What are the possiblities for the intersection of two of the vertical planes and plane B?

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Endria
 
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