| A | B |
|---|
| acute angle | angle measuring between 0 and 90 degrees |
| obtuse angle | angle measuring between 90 and 180 degrees |
| reflex angle | angle measuring between 180 and 360 degrees |
| right angle | angle measuring 90 degrees |
| straight angle | angle measuring 180 degrees |
| vertex | point of an angle where its edges meet |
| complementary angles | two angles that sum to 90 degrees |
| supplementary angles | two angles that sum to 180 degrees |
| adjacent angles | angles that share a common vertex and edge, but no interior points |
| vertical angles | two angles opposite each other, formed by two intersecting lines |
