Geometry crosswords

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Across
  1. 1. is absolute value of the difference of two coordinates on a line.
  2. 8. points on the same line
  3. 9. endpoints in-between endpoints going in a line
  4. 10. two endpoints with point
  5. 14. extends without end
  6. 15. points on the same plane
Down
  1. 2. a set of two points or more geometric figures have in common.
  2. 3. words with formal definitions
  3. 4. end of line segments
  4. 5. words without formal definitions
  5. 6. math of individual shapes
  6. 7. all endpoints going in a line
  7. 11. set of points consisting of two different rays that have the same endpoint.
  8. 12. a location on a line
  9. 13. flat surface made up from 2 dimensions