Pythagorean theorem Crossword puzzle

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Across
  1. 8. a shape with three sides
  2. 10. The inverse of squaring a number
  3. 11. Contains the set of rational numbers and the set of irrational numbers
  4. 12. The square root symbol
  5. 13. The point where the zero points of the two number lines meet
  6. 14. who made then theorem
  7. 15. it is the second part of word Pythagorean …
Down
  1. 1. a shape with 4 sides
  2. 2. The other part two a right triangle
  3. 3. The vertical number line in the coordinate plane
  4. 4. The horizontal number line in the coordinate plane
  5. 5. part of a right triangle
  6. 6. The division of the coordinate plane
  7. 7. The first number in an ordered pair
  8. 9. Includes the x-axis and the y-axis