Geometry puzzle

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Across
  1. 2. an angle that is more than 0 but less than 90
  2. 4. a
  3. 6. the absolute distance between two points
  4. 7. two angles that when added equal 180
  5. 10. points that are on the same line
  6. 11. points that lie in the same plane
Down
  1. 1. end and is represented by a slanted four-sided figure
  2. 3. the mark of the end of a segment or ray
  3. 5. a one dementional mark that goes on forever
  4. 8. A flat surface made up of points that has two dimensions and extends
  5. 9. a location in space that is represented by dot