Trig puzzle

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Across
  1. 1. all sides are different
  2. 4. The angle measurement is more than 180 but less than 360
  3. 5. The angle measurement is more than 90
  4. 6. The angle measurement is 180
  5. 8. a tool used to measure or to make exact angles
  6. 10. first person to call the person cosmos or to make the Pythagoras theorem
  7. 12. The angle measurement is less than 90
  8. 13. the quantitative relation between two different amounts with the same measurement scale
  9. 15. adjacent side is divided by hypotenuse
  10. 17. 2 sides are same the other is different
  11. 19. right angle triangle opposite
Down
  1. 2. all sides are same
  2. 3. The angle measurement is exactly 90
  3. 7. the study of triangles
  4. 9. next-to a side
  5. 11. a tool used to measure vertical or horizontal angles
  6. 14. opposite side is divided by adjacent side
  7. 16. sine but not sine(opposite)
  8. 18. opposite side is divided by the hypotenuse