| A | B |
|---|
| endpoint | a point at the end of segment |
| segment | is part of a line |
| postulate | a statement that is accepted true |
| point | names a location |
| opposite rays | 2 rays that have common endpoint |
| ray | has 1 endpoint and extends on forever |
| line | straight path and extends on forever |
| plane | flat surface and extends on forever |
| collinear | points that lie on the same line |
| coplanar | points that lies in the same plane |
| distance | absolte value of difference between 2 points |
| coordinate | point corresponds to one and only one number |
| congruent segments | segments with same length |
| bisects | divides |
| midpoint | point that divides the segment into 2 equal parts |
| construction | a way of creating a figure |
| straight angle | an angle measures 180 |
| right angle | an angle measures 90 |
| acute angle | an angle measures less than 90 |
| obtuse angle | an angle measures more than 90 less than 180 |
| angle | figure formed by two rays with common endpoints |
| Adjacent angle | 2 angles with common sides |
| vertical angles | 2 nonadjacent formed by intersecting lines |
| Complimentary angle | 2 angles whose sum is 90 |
| supplementary | 2 angles whose sum is 180 |
| perimeter | distance around the figure |
| area | # of square units to cover figure |
| circumference | distance around the figure |
| diameter | segment goes through center of circle |
| radius | sebment endpoint is center and goes to edge |
