Steven's Crossword puzzle

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Across
  1. 4. a number that is a cube of a whole number
  2. 5. 0,0 the point where the axes intersect
  3. 6. the longest side of a right triangle
  4. 8. a decimal that ends
  5. 9. the horizontal number line on a coordinate plane
  6. 10. a decimal that repeats the same digit
  7. 12. the two shortest sides of a right triangle
  8. 13. numbers that can't be written in the form a/b
  9. 16. the number of the vertical units a point from the origin
  10. 19. a grid formed by the intersections of two number lines
  11. 20. is another number that when multiplied by itself its equal to the given number
Down
  1. 1. the vertical number line on a coordinate plane
  2. 2. a number of a horizontal units a point is from the origin
  3. 3. is another number that when multiplied by its self twice it equals the given number
  4. 7. an equation that shows the relationship between the legs and the hypotenuse
  5. 11. a number that can be written in the form a/b
  6. 14. x,y gives the coordinates of the location of a point
  7. 15. a number that is a square of a whole number
  8. 17. all rational and irrational numbers
  9. 18. the axes divide the plain into four sections