Across
- 2. angle/ 90 degrees
- 4. lines/ coplanar lines that do not intersect
- 8. angles/ exactly equal in size and shape
- 9. a flat surface on which a straight line joining any two points on it would wholly lie
- 11. conclusion you reach by using inductive reasoning
- 13. angles/ either of two angles whose sum is 90 degrees
- 14. lines/ noncoplanar--are not parallel and do not intersect
- 16. angles/ each of the pairs of opposite angles made by two intersecting lines
- 18. the set of all points
Down
- 1. angles/ more than 90° and less than 180°
- 3. property of equality
- 5. series of points that extends in two opposite directions without end
- 6. angles/ either of two angles whose sum is 180 degrees
- 7. characterized by or exhibiting symmetry
- 8. in the same plane
- 10. accepted statement of fact
- 12. property of congruence
- 15. a location in space, has no size
- 17. angle/ smaller angle, less than 90 degrees