Geometry crossword puzzle

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Across
  1. 3. 5 sides with a interior measure of 540
  2. 6. four equal sides with a interior sum of 360
  3. 7. where two lines stay the same distance apart but never cross
  4. 9. a angle whos measurement is smaller than 90 degrees
  5. 15. A triangle that has no equal sides. All 3 sides are different lengths.
  6. 17. A triangle that has 2 equal sides.
  7. 18. A triangle that has one right angle.
  8. 19. Part of a line that has one end point and goes in one direction without end.
  9. 20. 10 sides with a interior sum of 1440
  10. 22. The middle point of a line segment
  11. 23. a unit used to measure a angle
Down
  1. 1. 9 sides with a interior sum of 1260
  2. 2. a angle whos measurement is 90 degrees
  3. 4. 6 sides with a interior measurement of 720
  4. 5. A triangle that has 3 equal sides.
  5. 8. four sides with a interior sum of 360
  6. 10. Two angles whose sum is 180 degrees
  7. 11. a angle whos measurement is larger than 90 degrees
  8. 12. 7 sides with a interior sum of 900
  9. 13. a straight line that has a beginning and a end
  10. 14. where two lines cross each others path
  11. 16. three sides with a interior sum of 180
  12. 21. 8 sides with a interior sum of 1080