Across
- 3. any two angles whose sum is 180 degrees.
- 4. two angles that are next to each other and share a common side.
- 7. straight path through indefinite points, extends in opposite directions
- 8. planes that do not intersect
- 10. not co-planar lines that do not intersect
- 12. points or lines that lie on the same plane
- 13. 2 co-planar lines that do not intersect
- 15. a line that intersect two or more lines
- 19. measure less than 90 degrees
- 20. measure greater than 90 degrees
Down
- 1. flat surface extends into opposite directions
- 2. two angles across from each other on intersecting lines. They are always congruent.
- 5. any two angles whose sum is 90 degrees.
- 6. point where 2 of more geometric figures meet
- 9. two angles that are adjacent and supplementary. They form a straight line.
- 11. indicate a location, have no size
- 14. part of a line with 1 endpoint
- 16. part of a line that has 2 endpoints
- 17. angle measure that is exactly 90 degrees
- 18. points points that lie on the same line