geometry puzzle

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Across
  1. 4. two rays that have the 'same endpoint and extend in opposite directions
  2. 7. a quadrilateral whose opposite sides are parallel and equal
  3. 8. having four right angles
  4. 11. extending or lying across
  5. 14. the length of a straight line through the center of a circle
  6. 16. a half circle formed by cutting the circle into two halves.
  7. 18. a parallelogram with four equal sides
  8. 22. a triangle with no two sides of equal length
  9. 23. a continuous portion of a circle
  10. 24. a round three-dimensional closed surface
  11. 26. an unproven statement which is supported by all the available data and by many weaker results
  12. 28. a polygon with four equal sides and four right angles
  13. 29. lying or acting in the same plane.
  14. 32. relation with respect to comparative quantity or magnitude
  15. 33. where 2 points meet
  16. 34. lying or acting in the same line.
  17. 37. the quality of being alike
  18. 38. angle measures less than 90 degrees
  19. 39. sum of 180 degrees
  20. 40. a four-sided polygon
  21. 43. a one-dimensional figure, which has length but no width.
  22. 44. corresponding in character or kind
  23. 45. a closed plane figure bounded by straight sides
  24. 46. sum of 90 degrees
  25. 47. location
Down
  1. 1. a line that touches a curve at only one point
  2. 2. a point equidistant from the ends of a line or the extremities of a figure
  3. 3. a three-sided polygon
  4. 5. triangle with 1 right angle
  5. 6. a quadrilateral with one pair of parallel sides
  6. 9. two or more lines that are always the same distance apart and never intersect, even if they are extended infinitely in both directions.
  7. 10. the space between two lines or planes that intersect
  8. 12. a polyhedron having a polygonal base and triangular sides
  9. 13. a plane curve with every point equidistant from the center
  10. 15. a line that divides a line segment or an angle into two equivalent parts
  11. 16. ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
  12. 17. ratio of the adjacent side to the hypotenuse of a right-angled triangle
  13. 19. at an angle of 90° to another line or surface
  14. 20. an area that is in the middle of some larger region
  15. 21. a line with a single endpoint (or point of origin) that extends infinitely in one direction
  16. 23. measure of a region
  17. 25. relation with respect to comparative quantity or magnitude
  18. 26. 6 sided polygon
  19. 27. either of two equal and opposite angles formed by the intersection of two straight lines
  20. 30. a line enclosing a plane area
  21. 31. the angle formed in the interior of a circle when two chords intersect on the circle
  22. 35. angle measures more than 90 degrees
  23. 36. angle measures 90 degrees
  24. 41. a one-dimensional figure which describes a path between two points
  25. 42. a straight line from the center to the perimeter of a circle