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Mathematics 10 Online
OpenStudy (anonymous):

IS IT D? >>>>> If two planes intersect, then they intersect in exactly _____. A. one point B. one plane C. two lines D. one line

OpenStudy (anonymous):

take a sheet of paper and fold it. open it up partly and imagine those two halves to be the planes that intersect. they seem to meet up at the fold. what does the fold look like?

Directrix (directrix):

D.one line One of the Geometry postulates.

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