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Mathematics 19 Online
OpenStudy (anonymous):

Is the answer 3?

OpenStudy (anonymous):

terenzreignz (terenzreignz):

Yes, you can always insert the plane which contains the segments BC and EH, the same cannot be said about the other pairs

ganeshie8 (ganeshie8):

two parallel lines are always co-planar two perpendicular lines can never be in same plane

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