# geometry

##### Across
1. 4. q ----- p
2. 7. rigid transformation
3. 8. a line that intersects two coplanar lines at distinct points, usually parallel
4. 11. a point where two rays begin or meet, where two line segments join or meet.
5. 12. nQ -------- nP
6. 17. altering a statement by writing the negative of the statement.
7. 18. a pair of adjacent angles (180) degrees whose non common side are opposite rays.
8. 20. 2 + 5 = 7 7 = 2 + 5
##### Down
1. 1. an unproven statement that is based on an observation.
2. 2. is a point that divides a segment into two congruent segments.
3. 3. a ray that divides an angle into two congruent coplanar angles.
4. 4. two angles whose sum is 90 degrees.
5. 5. are two non-adjacent angles formed by intersecting lines.
6. 6. If a = b and b = c, then a = c
7. 9. ab = ab
8. 10. Next to
9. 12. alternate interior/exterior angles, and corresponding angles are?
10. 13. when a line meets or crosses another line at 90 degrees.
11. 14. two angles whose measure has a sum of 180 degrees.
12. 15. educated guess
13. 16. an angle formed by the perpendicular intersection of two straight lines.
14. 19. corresponding parts of congruent triangles are congruent