| A | B |
|---|
| line | straight and extend forever in both directions |
| segment | a part of a line with two endpoints |
| ray | a part of a line with one endpoint and extends forever in one direction |
| angle | two rays with a common endpoint |
| vertex | the common endpoint of the sides in an angle |
| triangle | a three-sided figure |
| conjecture | a theory, hypothesis, or educated guess |
| inductive reasoning | reasoning based on past experiences or patterns |
| degrees | unit used to measure angles |
| acute angle | an angle less than 90 degrees |
| right angle | an angle measuring exactly 90 degrees |
| obtuse angle | an angle greater than 90 degrees |
| straight angle | an angle measuring exactly 180 degrees |
| congruent | having the same size and shape |
| Langenderfer | your Geometry teacher's last name |
| bisect | to cut into 2 equal pieces |
| trisect | to cut into 3 equal pieces |
| plane | a flat surface extending forever in all directions |
| postulate | an accepted statement of fact |
| midpoint | a point that divides a segment into two congruent pieces |
| skew | noncoplanar lines that never intersect |
| parallel | coplanar lines that never intersect |
| perpendicular | lines that form right angles |
| supplementary | angles that sum to 180 degrees |
| complementary | angles that sum to 90 degrees |
| vertical angles | opposite angles formed by intersecting lines |
| adjacent angles | angles that are next to each other and share a side and their vertex |
| your first Geometry test | this FRIDAY!!! |
