| A | B |
|---|
| Congruent | Equal measure |
| Acute angle | An angle that measures less that 90 degrees |
| Right angle | An angle that measures exactly 90 degrees |
| Obtuse angle | An angle that measure more than 90 but less than 180 degrees |
| Straight angle | An angle that measures 180 degrees |
| Complementary angles | Two angles whose sum is 90 degrees |
| Supplementary angles | Two angles whose sum is 180 degrees |
| Adjacent angles | Two angles that are side by side and share a ray |
| Corresponding angles | Two angles that hold the same position in relation to parallel lines |
| Vertical angles | Two angles that are opposite from each other |
| The angle that is complementary to 60 degrees | 30 degrees |
| Two angles that are congruent and complementary | 45 degrees |
| The angle that is supplementary to 20 degrees | 160 degrees |
| The angle that is complementary to 10 degrees | 80 degrees |
| The angle that is supplementary to 110 degrees | 70 degrees |
| The place where two rays come together to form an angle | vertex |
| a location in space | point |
| part of a line that has two endpoints | line segment |
| The angle that is complementary to 25 degrees | 65 degrees |
| The angle that is supplementary to 179 degrees | 1 degree |
