| A | B |
|---|
| acute angles | less than 90 degrees |
| right angle | 90 degrees |
| obtuse angles | greater than 90 less than 180 |
| straight angle (line) | 180 degrees |
| vertical angles | are congruent/across from each other |
| adjacent angles | angles that are next to each other/share a common ray |
| supplementary angles | 2 or more angles that add up to 180 degrees |
| complementary angles | 2 or more angles that add up to 90 degrees |
| acute triangle | all 3 angles are less than 90 degrees |
| parallel lines | two lines that never intersect/same distance apart |
| perpendicular lines | form right angles |
| obtuse triangle | one angle is greater than 90 degrees |
| right triangle | one angle is equal to 90 degrees |
| scalene triangle | no sides are equal |
| isosceles triangle | 2 sides are equal |
| equilateral triangle | all 3 angles are congruent and all 3 sides are congruent |
| triangle | 3 sided figure whose angles add up to 180 degrees |
| pythagorean theorem | in a right triangle, the sum of the legs square is equal to the hypotenuse squared |
