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| a part of a line that begins at one point and ends at another |
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| a part of a line that starts at a point and extends infinitely in one direction |
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| a figure formed by two rays with a common endpoint |
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| the point in common of the two rays that form an angle |
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| the region of a plane that falls between the two rays that form an angle (i.e., If two points, one from each side of an angle, are connected by a segment, the segment will pass through the __________ |
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| the portion of the plane containing an angle that is not in the angle's interior |
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| an angle whose measure is 90 degrees. |
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| an angle whose measure is less than 90 degrees. |
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| an angle whose measure is more than 90 degrees and less than 180 degrees |
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| an angle formed by two rays that go in opposite directions. This measures 180 degrees and is also known as a line! |
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| a pair of angles that share a side and form a line |
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| to have one or more points in common |
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| the set of all points that two geometric figures have in common |
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| a statement that is accepted as true without proof |
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