Geometry crossword puzzle

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Across
  1. 1. a transformation that can reduce or enlarge a figure
  2. 3. a transformation that turns a pre-image
  3. 5. symmetry, the smallest angle of rotation, for which a figure will be mapped onto itself
  4. 7. the figure produced by a transformation
  5. 8. a change in the position, size or shape of a geometric figure
  6. 10. the number of distinct rotations of a degree, that align all points in a figure with rotational symmetry
  7. 12. a directed line, segment with an initial point, and terminal point
  8. 13. the composition of a translation, followed by a reflection in a line parallel to the translation vector
  9. 15. symmetry exhibited by a planar figure in which rotation around appointments, the figure onto itself
  10. 17. the clockwise or counter, clockwise, listing of the vertices of a polygon
  11. 18. the transformation that slide a pre-image by ethics distance in a given direction
  12. 19. symmetry exhibited by a solid that can be divided by a plane into two halves that are reflections of each other
  13. 20. symmetry exhibit by a figure that maps onto itself worth a rotation of 180°
Down
  1. 2. a mapping of a pre-image back onto itself, so that the pre-image and image or the same set of points
  2. 4. a transformation that preserves distance
  3. 6. the perpendicular bisector of any segment, connecting a pre-image point to its image
  4. 9. a geometric figure before a transformation
  5. 11. a transformation that flips a pre-image across a line
  6. 14. symmetry exhibited by a collinear figure in which a reflection in a line maps to figure onto itself
  7. 16. exhibited by a figure in which in isometry maps to figure into itself