| colplanerpoints | | vertical angles are ____________. |
| segmentbisector | | a statement formed by writing the negative of the original statement. |
| congruentsegments | | a ray that divides an angle into two adjacent angles that are congruent. (two words) |
| segment | | a conditional statement that is formed by swithing the hypothesis and the conclusion. |
| collinearpoints | | if a=b, then b=a; ____________ property. |
| ray | | a segment, ray, line, or plane that divides a segmentat its midpoint. (two words) |
| supplementary | | rules that are accepted without proof. "duh" |
| conditionalstatement | | a=a; ___________ property. |
| converse | | the set of points that figures have in common. |
| perpendicular | | the "then" part of a conditional statement. |
| counterexample | | a true statement that follows as a result of othertrue statements. IT MUST BE PROVEN. |
| negation | | a point that divides a segment into two congruent segments. |
| reflexive | | a statment that coontains the phrase "if and only if" and is equivalent to writing a conditional statement and its converse. (two words) |
| intersection | | rules that had to be proven. |
| midpoint | | points that do not lie on the same plane. (two words) |
| congruent | | if the sum of two angles is 180, then they are _____________. |
| symmetric | | point, line, plane are all ___________ terms. |
| obtuseangle | | a process that involves looking for patterns and making conjectures. (two words) |
| linearpair | | angle that measures exactly 180 degrees. (two words) |
| noncollinearpoints | | two adjacent angles whose non-common sides are opposite rays. (two words) |
| inductivereasoning | | angle that measeures 89 degrees or less. (two words) |
| parallel | | two planes that do not intersect. |
| parallelplanes | | segments that have the same length. (two words) |
| hypothesis | | an example that shows a conjecture is false. |
| postulates | | points that lie on the same plane. (two words) |
| anglebisector | | if the sum of two angles is 90, than they are |
| adjacentangles | | angle that measures exactly 90 degrees. (two words) |
| straightangle | | points that do not lie on the same line. (two words) |
| theorem | | a conditional statement that is formed by switching and negating th hypothesis and the conclusion. |
| contrapositive | | if a=b and b=c, then a=c; ____________ property. |
| complementary | | part of a line that consists of an initial point and all points to one side of thgat point. |
| iff | | points that lie on the same line. (two points) |
| acuteangle | | angle that measures from 91 degrees to 179 degrees. (two words) |
| conjecture | | a line that intersects two or more coplaner lines at different points. |
| noncoplanerpoints | | if two lines are coplaner and do not intersect, then they are _____________. |
| deductivereasoning | | a logical statements with two parts. (two words) |
| theorems | | consists of two different rays that have the same initial point. |
| rightangle | | part of a line that conists of two endpoints and all of the points in between. |
| skew | | an unproven statement that is based om observations. |
| biconditionalstatement | | using facts, definitions, and accepted properties in a logical order to write a logical argument. (two words) |
| oppositerays | | if two lines intersect to form a right angle, then they are ___________. |
| angle | | two collinear rays that have the same initial point, but extend in opposite directions. (two words) |
| transversal | | the "if" part of a conditional statement. |
| undefined | | abbreviation for "if and only if". |
| conclusion | | two angles that share a common vertex, a common side, and no common interior points. (two words) |
| transitive | | lines that do not intersect and are not coplaner are __________. |
