Right triangles

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Across
  1. 3. mathematics concerned with relationships between angles and ratios of lengths
  2. 7. angle formed by the horizon and a line of sight that looks up
  3. 9. when two objects are alike but not identical
  4. 11. next to
  5. 12. unit of measure for angles
  6. 13. a set of three nonzero whole numbers that satisfy the Pythagorean Theorm
  7. 14. comparison of two quantities
  8. 16. the ratio of the side adjacent to an angle to its hypotenuse
  9. 17. across from
  10. 18. longest side of a right triangle
Down
  1. 1. an angle that measures exactly ninety degrees
  2. 2. the sum of the squares of the legs of the triangle equals the square of the hypotenuse
  3. 4. the ratio of the side opposite an angle to its hypotenuse
  4. 5. the ratio of the side opposite an angle to the side adjacent to the angle
  5. 6. sides of a right triangle that are not the hypotenuse
  6. 8. closed figure with three sides and three angles
  7. 10. angle formed by the horizon and a line of sight that looks down
  8. 15. the opposite or reverse of something