Geometry Crossword

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Across
  1. 2. Points or lines that all lie in the same plane.
  2. 7. polygon A geometric figure with no indentations.
  3. 10. Two distinct coplanar that do not intersect.
  4. 11. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
  5. 13. Lying on the same line.
  6. 14. Two angles that add up to 180°.
  7. 16. When two lines intersect four angles are formed and the two angles across from each other.
  8. 17. A solid with parallel congruent bases which are both polygons. The bases must be oriented identically.
  9. 18. Two angles in a plane which share a common vertex and a common side but do not overlap.
  10. 22. A line segment, line, or plane that divides a geometric figure into two congruent halves.
  11. 23. Two acute angles that add up to 90°.
  12. 25. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
  13. 28. All points between two given points (including the given points themselves).
  14. 29. A planar surface of a solid figure.
  15. 30. A closed plane figure for which all sides are line segments. The name of it describes the number of sides.
  16. 33. A solid with no curved surfaces or edges. All faces are polygons and all edges are line segments.
  17. 35. 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.
  18. 39. A complete circular arc. The distance around the the outside of a circle.
  19. 42. An assertion that can be proved true using the rules of logic.
  20. 43. A pair of adjacent angles formed by intersecting lines.
  21. 44. Also called non-coplanar lines. They are straight lines that are neither parallel, nor intersecting.
  22. 46. 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.
  23. 48. The side of a right triangle opposite the right angle.
Down
  1. 1. A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve.
  2. 3. An angle that has measure more than 90° and less than 180°.
  3. 4. Exactly equal in size and shape.
  4. 5. point B is between points A and C if it is on the line segment connecting A and C.
  5. 6. The point halfway between two given points.
  6. 8. A flat surface extending in all directions.
  7. 9. Angles opposite one another at the intersection of two lines.
  8. 12. A line segment between the center and a point on the circle or sphere.
  9. 15. A polyhedron with a polygonal base and lateral faces that taper to an apex.
  10. 19. 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.
  11. 20. A statement accepted as true without proof.
  12. 21. a term or word that does not require any explanation or description.
  13. 24. An angle that has measure less than 90°.
  14. 25. At a 90° angle.
  15. 26. two rays with a common end point that form a line.
  16. 27. Two rays sharing a common endpoint.
  17. 31. The geometric figure formed by two points. A straight path connecting two points and extending beyond the points in both directions.
  18. 32. A unit of angle measures equal to of a complete revolution.
  19. 33. The distance around the outside of a plane figure. For a polygon, it is the sum of the lengths of the sides.
  20. 34. A line segment between two points on the circle or sphere which passes through the center.
  21. 36. The geometric figure formed at the intersection of two distinct lines.
  22. 37. the amount of space in the boundary of a flat object.
  23. 38. A three dimensional solid consisting of all points equidistant from a given point.
  24. 40. A straight line along which two faces of a solid meet.
  25. 41. 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.
  26. 45. 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.
  27. 47. A part of a line starting at a particular point and extending infinitely in one direction.