6th gibbons

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Across
  1. 4. Two or more straight coplanar lines that do not intersect.
  2. 5. A flat surface that can extend forever in length and width but has no thickness.
  3. 6. Two rays sharing a common endpoint. Angles are typically measured in degrees or radians.
  4. 7. The surface included within a closed figure, measured by the number of square units needed to cover the surface.
  5. 10. A solid bounded by at least four polygonal faces. The pairs of faces meet along their edges. Three or more edges meet in each vertex.
  6. 11. A perfect round ball. It is a closed solid bounded by a surface on which all points are equidistant from a central point called the center.
  7. 14. On the coordinate plane, the pair of numbers giving the location of a point (ordered pair). In three-dimensional coordinates, the triple of numbers giving the location of a point (ordered triple). In n-dimensional space, a sequence of n numbers written in parentheses.
  8. 16. The point on a line segment that divides the given line segment into two congruent parts.
  9. 19. A shaped figure is a set of points some of whose chords include points that are in the set. When at least one of the interior angles of the shape is greater than 180°, it is a different shape.
  10. 21. An angle that has measure less than 90°.
  11. 22. The distance from the center of a circle to any point on its circumference.
  12. 25. The side of a right triangle opposite the right angle. Note: The hypotenuse is the longest side of a right triangle.
  13. 26. A geometric figure with no indentations. Formally, a geometric figure is convex if every line segment connecting interior points is entirely contained within the figure's interior.
  14. 28. Postulate is a true statement, which does not require to be proved.
  15. 30. A pair of angles that add up to 90°. As shown, 1 is the complement angle of 2
  16. 32. A line segment, line, or plane that divides a geometric figure into two congruent halves.
  17. 35. The length of the boundary around a shape or a figure.
  18. 36. A complete circular arc. It also means the distance around the the outside of a circle.
  19. 38. following figure has 5 faces.
  20. 41. Two lines that intersect at right angles.
  21. 42. 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.
  22. 44. Part of a line between two points called endpoints
  23. 45. Exactly equal in size and shape. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. For any set of congruent geometric figures, corresponding sides, angles, faces, etc. are congruent.
  24. 46. point at which the two rays of an angle meet or the intersection point of two sides of a plane figure. A point shared by three or more sides of a solid figure.
  25. 47. A planar surface of a solid figure.
  26. 48. A polyhedron whose one face is a polygon and the other faces are triangles with one common vertex.
Down
  1. 1. Lying in the same plane. For example, any set of three points in space are coplanar.
  2. 2. Two angles that are adjacent (share a leg) and supplementary (add up to 180°)
  3. 3. Point B is beside points A and C if it is on the line segment connecting A and C.
  4. 8. Also called non-coplanar lines. They are straight lines that are neither parallel, nor intersecting. They lie in different planes.
  5. 9. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions; or, a general conclusion that has been proved.
  6. 12. Lying on the same straight line.
  7. 13. A three-dimensional geometric figure with parallel congruent bases. The bases can be shaped like any closed plane figure (not necessarily a circle) and must be oriented identically.
  8. 15. Two angles in a plane which share a common vertex and a common side but do not overlap. Angles 1 and 2 below are adjacent angles.
  9. 17. A closed plane figure bounded by at least three line segments.
  10. 18. A geometric object that has no dimension and is used to indicate a location.
  11. 20. A point shared by three or more sides of a solid figure.
  12. 23. Also called half-line. It is a straight line that extends from a point.
  13. 24. When two lines intersect, four angles are formed
  14. 27. Two angles that add up to 180°.
  15. 29. An angle that is between 90° and 180°.
  16. 31. point, line and plane; Points and lines are two of the most fundamental concepts in Geometry, but they are also the most difficult to define.
  17. 33. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
  18. 34. A space figure with two parallel polygonal bases that are the same shape and the same size.
  19. 36. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
  20. 37. Two rays with a common endpoint that point in opposite directions and form a straight line.
  21. 39. A three-dimensional geometric figure with parallel congruent bases. The bases can be shaped like any closed plane figure (not necessarily a circle) and must be oriented identically.
  22. 40. A line segment between two points on the circle or sphere which passes through the center. The word diameter is also also refers to the length of this line segment.
  23. 43. A line segment where two faces of a polyhedron meet.
  24. 44. The path of a point moving in opposite directions infinitely. A line has neither width nor thickness but length. It is the shortest distance between two points.
  25. 45. A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve.