| Term | Definition |
|---|
| conjecture | an unproven statement that is based on observations. |
| inductive reasoning | a process that includes looking for patterns and making conjectures. |
| counterexample | an example that shows a conjecture is false. |
| point | a location. Represented by a small dot. Named by a capital letter. |
| space | The set of all points. |
| line | A series of points that extend in two directions without end. It has an infinite number of points on it. |
| collinear points | points that lie on the same line. (all points are _____ with eachother). |
| plane | Flat surface. Has no thickness. Extends without end in all directions. |
| coplainer points | Points and lines in the same plane. |
| postulate (or axiom) | An accepted statement of fact. |
| segment | Part of a line consisting of two points, called endpoints, and all points between them. |
| ray | Part of a line consisting of one endpoint, called the initial point, and all the points of the line on one side of the initial point/endpoint. |
| opposite rays | Two collinear rays with the same initial point. |
| parallel lines | Coplanar lines that do not intersect. |
| skew lines | Noncoplanar lines. They are not parallel and do not intersect. |
| parallel planes | Planes that do not intersect. |
Combine with other sets
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