Across
- 2. the length of a line segment
- 5. adjacent angles that lie on a line
- 8. two angles that add up to 180
- 12. two angles that add up to 90
- 15. a point on a line that is divides the line into two congruent halves
- 16. angles formed by intersecting lines and only share a common vertex
- 17. angles that are greater than 90 but less than 180 degrees
- 18. when angles are line segments have equal measure
- 19. the corner of an angle, polygon, or polyhedron
Down
- 1. a line or ray that divides an angle into two congruent parts
- 3. when points all lie on the same plane
- 4. a geometric figure made up of at lease 2 points
- 6. an angle that is 90 degrees
- 7. when points all lie on the same line
- 9. when two lines, rays, or segments intersect to form a right angle
- 10. a line with endpoints
- 11. a flat surface made up of 3 or more noncollinear points
- 13. angles that share a common vertex and a common side
- 14. angles that are less than 90 degrees