| Term | Definition |
|---|
| angle | A figure formed by 2 rays with a common end point. |
| obtuse angle | An angle that has a measure of greater than 90 degrees. |
| acute angle | An angle that has a measure of less than 90 degrees. |
| complimentary angle | Two angles who measure in degrees add up to 90 degrees |
| congruent | adjective: Exactly the same |
| supplementary angle | two angles whose measure in degrees adds up to 180 degrees |
| Parallel lines | Lines that never intersect or cross. |
| perpendicular | Lines that intersect at right angles. |
| right angle | An angle that has a measure of 90 degrees. |
| transversal | A line that crosses parallel lines. |
| vertical angles | Congruent opposite angles formed by two intersecting lines. |
| point | A location in space. |
| line | Perfectly straight collection of points that extends forever in both directions. Shown with arrows at each end. |
| line segment | A part of a line that has two points, called endpoints. |
| perpendicular lines | Lines that intersect at right angles. |
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