geometry puzzle

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Across
  1. 4. the number of square units needed to cover a surface
  2. 5. of any surface is the number of square units required to cover the surface.
  3. 6. the nearness of a measurement
  4. 10. parallelogram with consecutive sides congruent.
  5. 12. lines two lines that intersect to form right angles.
  6. 15. segment whose endpoints are the center of the circle and a point on the circle.Chord – segment that connects two points on the circle.
  7. 17. sides that are all the same length
  8. 19. angles two angles whose sum is 180 degrees.
  9. 22. arcs arcs with equal measure in the same circle or in congruent circles.
  10. 24. all sides congruent and all four right angles.
  11. 25. line that intersects a circle in two points.
  12. 26. angles the non-adjacent angles formed by two intersecting lines.
  13. 28. of a polygon is the distance around the polygon.
  14. 29. a part of a line having only one endpoint.
  15. 31. divide into two equal parts
  16. 32. a closed figure with 3 sides
  17. 34. is a prism where all sides are squares.
  18. 35. arcs in a circle that have exactly one point in common
  19. 38. A round body whose surface is at all points equidistant from the center.
  20. 40. points that lie on the same line.
  21. 44. angle of a circle angle whose vertex is the center of the circle and whose rays are radii of the circle.
  22. 45. of a 3-dimensional figure is the number of cubic units contained in the solid.
  23. 47. points that do not lie on the same line
  24. 48. a flat surface that extends endlessly in all directions.
  25. 49. chord that passes through the center of the circle.
  26. 50. is a prism whose parallel faces (the bases) are congruent triangles.
  27. 52. Extends in two directions infinitely
Down
  1. 1. points that do not lie on the same plane.
  2. 2. angles angle whose vertex is on the circle and whose sides are chords of the circle.
  3. 3. arc whose endpoints are the endpoints of a diameter.
  4. 7. angles two angles whose sum is 90 degrees.
  5. 8. equal in size and shape
  6. 9. an angle whose measure is 90°
  7. 11. arc arc whose measure is less than a semi-circle (180 degree).
  8. 13. the distance around a circle.
  9. 14. congruent polygons lying in parallel planes.
  10. 16. two lines that have a common endpoint
  11. 18. divides a figure into two congruent halves that reflect each other.
  12. 20. two lines in a space that never meet
  13. 21. line in the plane of the circle that intersects the circle in one point
  14. 23. parallelogram with a right angle.
  15. 27. an angle whose measure is 180°.
  16. 30. segment is bounded by two distinct points on a line.
  17. 33. angles two coplanar angles with a common vertex and a common side between them
  18. 36. part of a circle that is defined by two endpoints
  19. 37. has two congruent circular bases in parallel planes.
  20. 39. points that lie on the same plane.
  21. 41. precise location on a plane
  22. 42. quadrilateral with exactly one pair of opposite sides parallel.
  23. 43. arc arc whose measure is greater than a semi-circle (180 degrees).
  24. 46. has a vertex and a circular base.
  25. 51. A three-dimensional figure with identical ends.