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Across 2. 2 angles that add to be 180 degrees 4. angles on different lines but in same relative location 7. angles that are beside one another 12. angle that measures less than 90 degrees 13. angle that measures exactly 90 degrees 15. angles that are across the vertex from one another and are always congruent 18. angles on the inside of 2 lines cut by a transveral but on opposite sides of the transversal 20. lines that intersect and form 90 degree angles 21. same shape and size 22. names a location 23. lines in a plane that will NEVER meet

Down 1. angles on the outside of 2 lines cut by a transversal but on opposite sides of the transversal 3. perfectly flat surface that extends forever in ALL directions 5. perfectly straight and extends forever in BOTH directions 6. part of a line that starts at one endpoint and extends forever in ONE direction 8. part of a line between two points 9. 2 angles that add to be 90 degrees 10. formed by 2 rays with a common endpoint called a vertex 11. angles on the INSIDE of 2 lines cut by a transversal 14. angle that measures exactly 180 degrees 16. angles on the OUTSIDE of 2 lines cut by a transversal 17. angle that measures more than 90 degrees 19. a line that intersects 2 or more other lines