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