Geometry crossword puzzle

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Across
  1. 4. a quadrilateral with exactly one set of parrellel sides
  2. 10. 4 sided polygon
  3. 11. a line segment between two points on the circle or sphere that passes through the center
  4. 14. angles two angles with measures that have a sum of 180
  5. 17. rays two collinear rays with a common endpoint
  6. 19. angles that are opposite one another at the intersection of two lines
  7. 21. two rays with a common vertex
  8. 22. the study of geometric figures in two dimensions and three dimensions
  9. 23. a polygon with 6 sides
  10. 24. another term for hendecagon
  11. 26. part of a line that starts at a point and extends to infinity
  12. 29. a quantity obtained by the addition of a group of numbers
  13. 30. is undefined and contains undifinetly many points
  14. 31. the definite distance between 2 points
  15. 33. corresponding in character or kind
  16. 34. a shape with a circular base and sides tapering to a point
  17. 37. a line which passes through atleast two points of a circle
  18. 39. the point at which the line crosses at the x-axis
  19. 40. a polygon with 8 sides
  20. 41. a group of nearly parallel lines of electromagnetic radiation
  21. 44. a point or value that marks the end of a ray
  22. 46. lines coplanar lines that do not intersect
  23. 48. a line segment that connects center of circle to outer edges
  24. 49. a parallelogram with four equal sides
  25. 51. a parallelogram with four right angles
Down
  1. 1. lying in the same plane
  2. 2. the longer of the two arcs between 2 points on a circle
  3. 3. area the sum of the areas of all faces and side surfaces of a three-dimensional figure
  4. 5. a quadrilateral with both pairs of opposite sides parallel
  5. 6. an angle less than 90 degrees but more than 0 degrees
  6. 7. the ratio of the length of the leg opposite to the length of the leg adjacent to the angle
  7. 8. a polyhedron with two congruent and parallel faces
  8. 9. one of the eight divisions of three-dimensional space
  9. 12. a polygon with 9 sides
  10. 13. a line segment, line or plane that divides a geometric figure into two congruent halves
  11. 15. a polygon with 5 sides
  12. 16. the 90 degree angle between two perpendicular lines
  13. 18. a complete circular arc. also refers to the distance around the outside of a figure
  14. 20. the point at which the line crosses at the y-axis
  15. 25. in or near an inner area
  16. 27. a polygon with 10 sides
  17. 28. the ratio of the length of the leg opposite an angle to the lenght of the hypotenuse
  18. 29. ratio of the length of the side opposite the given angle to the length of the hypotenuse of a right-angled triangle
  19. 32. the sum of the lengths of the sides of a polygon
  20. 35. a particular aspect of life or activity
  21. 36. a continuous portion of a circle
  22. 38. the slope of a horizontal line
  23. 42. relating to or situated in or extending toward the middle
  24. 43. written on or in a surface
  25. 45. relation with respect to comparative quantity or magnitude
  26. 47. angle angle that measures 180
  27. 50. the intersection of the y and x coordinate planes