Geometry

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Across
  1. 2. A traditional holiday song
  2. 4. Halfway between two endpoints
  3. 6. When three or more lines intersect at the same point
  4. 8. Also famously hates Christmas
  5. 10. December 25 every year
  6. 11. Lines that do not intersect
  7. 13. Moves a figure while preserving length and angle measure (2 words)
  8. 16. These angles are always congruent
  9. 19. An angle between 90 and 180 degrees
  10. 22. Where altitudes meet
  11. 23. Having the same shape and size
  12. 25. Comet, for example
  13. 27. Geometry teacher
  14. 30. The direction of the lettering around a polygon
  15. 32. Connects vertex to the midpoint of the opposite side of a triangle
  16. 34. The distance around a polygon
  17. 35. Where angle bisectors meet
  18. 36. A triangle with two congruent sides
  19. 37. Festival of Lights
Down
  1. 1. Gift on the second day of Christmas (2 words)
  2. 3. Can split an angle into two congruent angles
  3. 5. Connects the midpoints of two sides of a triangle
  4. 7. A triangle with no congruent sides
  5. 9. Ho Ho Ho
  6. 12. Where perpendicular bisectors meet
  7. 14. A 90 degree angle
  8. 15. A mirror image
  9. 17. Where medians meet
  10. 18. Turning a figure
  11. 20. Points that do not move during a transformation
  12. 21. Hangs on a tree
  13. 24. Sliding a figure
  14. 26. Sits on a shelf
  15. 28. Famously hates Christmas
  16. 29. These lines form right angles
  17. 31. This is perpendicular to the side of a triangle
  18. 33. Talking snowman