Geometry Puzzle!

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Across
  1. 4. The sum of the side lengths of a closed plane figure
  2. 9. The number of non-overlapping unit squares of a given size that will exactly cover the interior of a plane figure
  3. 13. In the same line
  4. 14. A statement that is accepted as true without proof
  5. 15. An undefined term in geometry; a flat surface that has no thickness and extends indefinitley
  6. 16. The original figure in a transformation
  7. 19. The common endpoint of the sides of the angle
  8. 22. an undefined term in geometry; names a location and has no size
  9. 24. The point or set of points at which two figures meet
  10. 25. A quantity that is completly expressed by its magnitude and has no direction
Down
  1. 1. A segment or arc subtends an angle if the endpoints of the segmentor arc lie on the side of the angle
  2. 2. A quantity that has both direction and magnitude
  3. 3. To divide into two congruent parts
  4. 5. An undefined term in geometry; a straight path that has no thickness and extends indefinitley
  5. 6. Symbols used to label the image in a transformation
  6. 7. A transformation that changes the size of a figure but not its shape
  7. 8. Extending indefinitley; endless. infinite space; immesureably or inconvinceivably great or extensive
  8. 10. The perpendicular distance from the center of a regular polygon to one of its sides
  9. 11. A transformation that does not change the size or shape of a figure
  10. 12. A part of a line that starts at an endpoint and extends indefinitley in one direction
  11. 17. A figure formed by two rays with a common endpoint
  12. 18. Having the same shape and size
  13. 20. In the same plane
  14. 21. A point at an end of a segment or the starting point of a ray
  15. 23. A statement that has been proven