MAKING GEOMETRY FUN

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Across
  1. 4. A length of cord, rope, wire, or other material serving a particular purpose.
  2. 7. A solid figure with many plane faces, typically more than six.
  3. 9. The continuous line forming the boundary of a closed geometric figure.
  4. 10. A position to the left or right of an object, place, or central point.
  5. 14. There are five convex regular polyhedra, known as the Platonic Solids. There are also four regular "star polyhedra", known as Kepler-Poinsot solids.
  6. 20. The enclosing boundary of a curved geometric figure, especially a circle.
  7. 21. A part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints.
  8. 22. A flat surface on which a straight line joining any two points on it would wholly lie.
  9. 26. Forming, situated on, or relating to the outside of something.
  10. 28. Two angles that have a common vertex and a common side.
  11. 30. A polygon which has all sides of the same length.
  12. 31. The lowest part or edge of something, especially the part on which it rests or is supported.
  13. 35. Either of two angles whose sum is 90°.
  14. 39. Having an outline or surface that curves inward like the interior of a circle or sphere.
  15. 40. A polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length).
  16. 41. A mathematical concept generally regarded as a set of points having some specified structure.
  17. 43. A line that splits an angle into two equal angles.
  18. 44. An angle of 90°, as in a corner of a square or at the intersection of two perpendicular straight lines.
  19. 45. An amount of space between two things or people.
  20. 49. The figure formed by two rays.
  21. 50. A ray in geometry is half of a line.
  22. 51. A solid or hollow object that tapers from a circular or roughly circular base to a point.
  23. 53. Each angular point of a polygon, polyhedron, or other figure.
  24. 54. A particular spot, place, or position in an area or on a map, object, or surface.
Down
  1. 1. The area of such an outer part or uppermost layer.
  2. 2. The amount of space that a substance or object occupies, or that is enclosed within a container, especially when great.
  3. 3. A point somewhere in the middle.
  4. 5. Situated within or inside; relating to the inside; inner.
  5. 6. A point, segment, line, or plane that divides a line segment into two equal parts.
  6. 8. An angle that measures more than 90 degrees but less than 180 degrees.
  7. 11. A point or line common to lines or surfaces that intersect.
  8. 12. A solid geometric figure with straight parallel sides and a circular or oval cross section.
  9. 13. At an angle of 90° to a given line, plane, or surface.
  10. 15. A polygon whose vertex angles are equal.
  11. 16. (of points) lying in the same straight line.
  12. 17. (of figures) identical in form; coinciding exactly when superimposed.
  13. 18. The outside limit of an object, area, or surface; a place or part farthest away from the center of something.
  14. 19. "sharp angle" that is less than 90 degrees.
  15. 23. Each of the pairs of opposite angles made by two intersecting lines.
  16. 24. The surface of a thing, especially one that is presented to the view or has a particular function, in particular.
  17. 25. A solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
  18. 27. Either of two angles whose sum is 180°.
  19. 29. A polygon with n sides. For example, an 8-gon is another name for an octagon.
  20. 32. A pair of adjacent, supplementary angles.
  21. 33. a polygon) having only interior angles measuring less than 180°.
  22. 34. The quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane.
  23. 36. In the same plane.
  24. 37. One of five regular solids (a tetrahedron, cube, octahedron, dodecahedron, or icosahedron).
  25. 38. The style or method used in the building of something.
  26. 41. A round solid figure, or its surface, with every point on its surface equidistant from its center.
  27. 42. A monumental structure with a square or triangular base and sloping sides that meet in a point at the top.
  28. 46. A plane figure with at least three straight sides and angles, and typically five or more.
  29. 47. At, into, or across the space separating (two objects or regions).
  30. 48. Any of a set of straight lines passing through one point.
  31. 52. A unit of measurement of angles, one three-hundred-and-sixtieth of the circumference of a circle.