Number Plane and Transformations

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Across
  1. 2. The worth of something.
  2. 4. Moving something clockwise or anticlockwise.
  3. 7. A flying transport vehicle.
  4. 10. A transformed shape or point.
  5. 15. Up/down direction.
  6. 16. A dot.
  7. 17. Piece of furniture with four legs.
  8. 18. (x,y)
  9. 19. The begining, first.
  10. 20. The centre of the number plane.
  11. 21. Optimistic.
  12. 22. Converting one language into another.
Down
  1. 1. To open a door, turn the knob in this direction.
  2. 3. Left/Right direction.
  3. 5. Pessimistic.
  4. 6. Another name for the number plane.
  5. 8. Two lines crossing at right angles.
  6. 9. To change.
  7. 11. Mirror.
  8. 12. Most books have lines, but in maths we use a special kind of book.
  9. 13. The direction to loosen a screw with a screwdriver.
  10. 14. The number plane split into four parts.