Trigonometry is Fun

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Across
  1. 1. Father (creator) of trigonometry
  2. 3. A triangle that has a 90 degree angle
  3. 4. Opposite over Hypotenuse
  4. 5. Next to the angle in question
  5. 8. The space measured in degrees between two intersecting lines
  6. 9. The long side of a triangle
  7. 11. Relations of the sides & angles of triangles
  8. 12. A figure with three straight sides & three angles
  9. 13. An irrational number
  10. 14. Having resemblance in appearance without being identical.
  11. 17. Opposite over Adjacent
  12. 19. The process of finding a number that shows the amount of something
  13. 20. The side opposite the angle in question
Down
  1. 2. The father of right angle triangles
  2. 4. The opposite of squaring a number
  3. 6. A statement that has been proved true
  4. 7. Having the same size & shape
  5. 10. Taking a number and multiplying by itself
  6. 15. A measurement unit for an angle
  7. 16. Adjacent over Hypotenuse
  8. 18. The relationship in 2 or more quantities: proportion.