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Mathematics 21 Online
OpenStudy (anonymous):

Perry observes the opposite,parallel walls of a room.in how many lines do the planes containing the walls intersect? A:2 B:0 C:1 D:3

OpenStudy (austinl):

|dw:1375297799830:dw| Is this what we are looking at?

OpenStudy (anonymous):

Yes

OpenStudy (austinl):

|dw:1375297979105:dw| These are the only places that the planes intersect on that picture.

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