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through any two points there exsists exactly one line |
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a line contains at least two points |
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if two lines intersect, then their intersection is exactly one point |
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through any three noncollinear points there exsists exactly one plane |
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a plane contains at least three noncollinear points |
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if two points lie in a plane, then the line containing them lies in the plane |
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if two planes intersect, then their intersection is a line |
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if a=b and c doesnt =0, then a/c=b/c |
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if a=b, then a can be substituted for b in any equation or expression |
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