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angle relationship
sol 8.6
| Question | Answer |
|---|---|
| acute angle | measures less than 90° |
| right angle | measures 90° |
| obtuse angle | measures between 90° and 180° |
| straight angle | measures 180° |
| complementary angles | 2 angles with a sum of measures = 90° |
| supplementary angles | 2 angles with a sum of measures = 180° |
| ray | a part of a line that has one endpoint and extends without end in one direction |
| vertex | a point at which two sides of angle meet |
| vertical angles | two nonadjacent angles formed by intersecting lines |
| adjacent | (side by side) two angles that share a common side and have the same vertex. |
| parallel lines | two lines in the same plane that do not intersect |
| transversal | a line that crosses at least two other lines. |