I had a geometry test last week. One of the questions was Two planes (sometimes,always,never) intersect in exactly one point. I put never because I thought that the intersection of two planes is always a line because planes go on forever. My geometry teacher marked this question wrong.
Can you please help me understand how two planes can intersect in one point if planes go on forever? Or am I right and my geometry teacher wrong? Do I need to tell him that he's wrong?
thank you.
Please note I am talkink of 2d planes not 3d ones.
2006-09-25
15:27:41
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14 answers
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asked by
iammisc
5
in
Mathematics