Congruence and Similarity

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Across
  1. 2. The result of spinning around (8)
  2. 4. A shape after applying the scale factor (5)
  3. 7. The meaning of a symbol with three horizontal lines (9)
  4. 10. A number that divides another without a remainder (6)
  5. 14. A shape before applying the scale factor (8)
  6. 15. Has three of everything (8)
  7. 16. Any 2D shape with straight edges (7)
  8. 18. Put over the top (11)
  9. 20. As seen in a mirror (10)
Down
  1. 1. A way of moving shapes without changing their angles and side lengths (14)
  2. 3. The result of sliding (11)
  3. 5. Corresponding (8)
  4. 6. Fish and drawings can both have them (5)
  5. 8. An increase in size (11)
  6. 9. The length of one side compared to another (5)
  7. 11. A two-dimensional figure (5)
  8. 12. A decrease in size (9)
  9. 13. Shapes that have matching sides in the same ratio are called this (7)
  10. 17. The edge of a shape (4)
  11. 19. The corner of a shape (6)