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1
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Lines that never intersect
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2
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a line that extends indefinitely in one direction and has no endpoints
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3
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part of a line that extends endlessly in one direction
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4
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the common endpoint
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6
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Lines that cross each other at some point
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7
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a line that has two endpoints
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8
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a slanted four sided figure that extends indefinitely in all directions
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9
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two rays that share common point
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