| A | B |
|---|
| acute angle | angle between 0 and 90 degrees |
| adjacent angle | 2 coplanar angles with common side &vertex but no common interior points |
| angle bisector | a ray that divides an angle into 2 congruent angles |
| axiom | accepted statement of fact aka postulate |
| collinear points | points lying on the same line |
| compass | geometric tool used to draw circles & arcs |
| complementary angles | 2 angles whose sum is 90 degrees |
| congruent angles | angles that have same measure |
| congruent segments | angles that have the same length |
| conjecture | conclusion reached by inductive reasoning |
| construction | a geometric figure made with only a straightedge & compass |
| coordinate | the real number(s) that correspond(s) to a point |
| coplanar | on the same plane |
| counterexample | example that proves a statement false |
| foundation drawing | drawing that shows base of structure & height of parts (2 dimensional) |
| inductive reasoning | reaches conclusion based on past event or pattern |
| isometric drawing | 3 dimensional drawing shows corner view |
| line | undefined; series of points extending in 2 directions |
| midpoint | point that divides into equal parts |
| net | 2 dimen pattern that can be folded into 3 dimen figure |
| obtuse angle | angle between 90 and 180 degrees |
| opposite rays | COLLINEAR rays with same endpoint |
| parallel lines | lines on same plane which never meet |
| parallel planes | planes that don't intersect |
| perpendicular bisector | line, segment, or ray that is perpendicular to segment at its midpoint |
| perpendicular lines | lines that intersect to form right angles |
| plane | undefined; flat surface extending infinately with no thickness |
| point | undefined; location, has no size |
| postulate | accepted statement of fact aka axiom |
| ray | line with one endpoint |
| right angle | angle measuring exactly 90 degrees |
| segment | line with 2 endpoints |
| skew lines | lines that DON'T lie in same plane |
| space | the set of all points |
| straight angle | angle measuring exactly 180 degrees |
| straightedge | ruler with no markings |
| supplementary angles | 2 angles whose sum is 180 degrees |
| vertical angles | 2 angles whose sides form 2 pairs opposite rays |
