Geometry Crossword

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Across
  1. 4. A corner point of a geometric figures. For a polygon, they are where adjacent sides meet. For an angle, it is where the two rays making up the angle meet.
  2. 7. An angle that has measure more than 90° and less than 180°.
  3. 8. A line segment between two points on the circle or sphere which passes through the center.
  4. 9. The distance around the outside of a plane figure. For a polygon, it is the sum of the lengths of the sides.
  5. 10. Exactly equal in size and shape.
  6. 11. A unit of angle measures equal to of a complete revolution.
  7. 12. The geometric figure formed at the intersection of two distinct lines.
  8. 15. A complete circular arc. The distance around the the outside of a circle.
  9. 17. Two distinct coplanar that do not intersect.
  10. 18. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
  11. 19. An assertion that can be proved true using the rules of logic.
  12. 20. A solid with parallel congruent bases which are both polygons. The bases must be oriented identically.
  13. 22. A term or word that does not require any explanation or description.
  14. 23. Two angles in a plane which share a common vertex and a common side but do not overlap.
  15. 25. When two lines intersect four angles are formed and the two angles across from each other.
  16. 29. An angle that measures 90° or /2 radians. It is the angle between two perpendicular lines such as the corner of a square or two perpendicular planes such as the wall and the ground.
  17. 30. A solid with no curved surfaces or edges. All faces are polygons and all edges are line segments.
  18. 32. The point halfway between two given points.
  19. 36. Two rays with a common end point that form a line.
  20. 37. A line segment between the center and a point on the circle or sphere.
  21. 38. A straight line along which two faces of a solid meet.
  22. 40. A pair of adjacent angles formed by intersecting lines.
  23. 41. The side of a right triangle opposite the right angle.
  24. 43. The amount of space in the boundary of a flat object.
  25. 44. A part of a line starting at a particular point and extending infinitely in one direction.
  26. 45. Also called non-coplanar lines. They are straight lines that are neither parallel, nor intersecting.
Down
  1. 1. A three-dimensional geometric figure with parallel congruent bases. The bases can be shaped like any closed plane figures (not necessarily a circle) and must be oriented identically.
  2. 2. A three dimensional solid consisting of all points equidistant from a given point.
  3. 3. A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve.
  4. 5. Lying on the same line.
  5. 6. At a 90° angle.
  6. 10. Points or lines that all lie in the same plane.
  7. 13. Angles opposite one another at the intersection of two lines.
  8. 14. point B is between points A and C if it is on the line segment connecting A and C.
  9. 16. A planar surface of a solid figure.
  10. 18. A geometric figure with no indentations.
  11. 20. A closed plane figure for which all sides are line segments. The name of it describes the number of sides.
  12. 21. A shape or solid which has an indentation or "cave". Formally, a geometric figure has at least one line segment connecting interior points which passes outside of the figure.
  13. 23. An angle that has measure less than 90°.
  14. 24. Two acute angles that add up to 90°.
  15. 26. Two angles that add up to 180°.
  16. 27. Two rays sharing a common endpoint.
  17. 28. All points between two given points (including the given points themselves).
  18. 30. A statement accepted as true without proof.
  19. 31. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
  20. 33. A polyhedron with a polygonal base and lateral faces that taper to an apex.
  21. 34. On the coordinate plane, the pair of numbers giving the location of a point (ordered pair). In n-dimensional shape, a sequence of n numbers written in parentheses.
  22. 35. The geometric figure formed by two points. A straight path connecting two points and extending beyond the points in both directions.
  23. 39. A line segment, line, or plane that divides a geometric figure into two congruent halves.
  24. 42. A flat surface extending in all directions.