Geometry (Pre-Algebra)
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| 345717029 | Point | A location in space | |
| 345717030 | Line | A series of points that extend in two directions without end | |
| 345717031 | Plane | A flat surface that extends in both directions without end | |
| 345717032 | Segment | Part of line that has two distinct endpoints | |
| 345717033 | Ray | Part of line that has one endpoint and then extends forever in the other direction | |
| 345717034 | Intersecting Lines | Lines that cross with one point in common | |
| 345717035 | Parallel Lines | Lines that are in the same plane but never intersect | |
| 345717036 | Skew Lines | Lines that are not in the same plane and are not parallel but also do not intersect | |
| 345717037 | Adjacent Angles | Angles that share a vertex and a side but no points in their interiors | |
| 345717038 | Vertical Angles | Formed by two intersecting lines that are opposite each other. They have the same measures | |
| 345717039 | Supplementary Angles | When the sum of the measures of two angles are 180 degrees | |
| 345717040 | Complementary | When the sum of the measures of two angles are 90 degrees | |
| 345717041 | Congruent Angles | Angles that have equal measure | |
| 345717042 | Transversal | A line that intersects two other lines in different positions | |
| 345717043 | Corresponding Angles | Angles that lie on the same side of the transversal in corresponding positions | |
| 345717044 | Alternate interior angles | An interior pair of angles that are on opposite sides of the transversal |