Geometry Chapter 1 Vocabulary

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Across
  1. 2. Three or more points are __________ if and only if they line on the same plane.
  2. 8. a solid with two parallel congruent circular bases connected by a curved surface
  3. 9. the set of all points extending in all directions in three dimensions
  4. 10. a single polygonal base connected by triangular faces to a common vertex
  5. 11. two rays joined at a common point that extend in opposite directions, forming a straight line
  6. 12. two noncollinear rays that share a common endpoint
  7. 14. the set of points common to two or more geometric figures
  8. 15. the measure of space occupied by a solid measured in cubic units
  9. 16. two angles whose measures add to 90 degrees
  10. 17. a unit of angle measurement equal to 1/360 rotations of a circle
  11. 18. the set of all points in space that are the same distance from a center point with no faces, edges, or vertices
  12. 20. a polyhedron with two parallel congruent faces connected by parallelogram faces
  13. 22. a line or plane that intersects a segment at its midpoint
  14. 23. a polygonal flat surface on a polyhedron
  15. 28. a term that has no formal definition, is only explained with descriptions and examples
  16. 30. a polygon whose side and angles are all congruent
  17. 33. the number of square units needed to cover a surface
  18. 35. Two or more points are ____________ if and only if they lie on the same line.
  19. 37. one line segment on a polygon
  20. 38. a polygon who's angles are all congruent
  21. 40. a closed figure formed by coplanar line segments called sides that intersect exactly two other sides but only at their endpoints
  22. 44. the set of points extending in two directions to infinity
  23. 45. a regular polyhedron - all faces are congruent polygons and all edges are congruent
  24. 47. inside a polygon
  25. 48. the distance around a geometric figure
  26. 49. a technique of producing geometric figures using various tools without measurement, usually a compass and straightedge
  27. 50. a polygon with n number of sides
  28. 52. a solid with all flat surfaces that enclose a single region of space
Down
  1. 1. two angles with a common side
  2. 3. the Platonic solids
  3. 4. the common endpoint of two rays of an angle or two sides of a polygon or three or more edges of a polyhedron
  4. 5. an angle that measures between 90 and 180 degrees
  5. 6. polygon a polygon whose sides are all congruent
  6. 7. the distance around a circle
  7. 9. two angles whose measures add to 180 degrees
  8. 12. a ray that divides an angle into two adjacent congruent angles
  9. 13. the opposite of concave
  10. 17. the length of a segment connecting two points
  11. 19. the point that lies halfway between two endpoints on a line segment
  12. 21. the sum of the areas of all surfaces of a solid
  13. 24. the line segment where two faces of a polyhedron intersect
  14. 25. two nonadjacent angles formed by two intersecting lines
  15. 26. part of a line that has one endpoint and extends in one direction to infinity
  16. 27. A polygon is _________ if a line containing any side also contains any point in the interior of the polygon
  17. 29. a pair of adjacent angles with noncommon sides that are opposite rays
  18. 31. a location in space with no size or shape
  19. 32. Two lines are _____________ if and only if their intersection forms right angles
  20. 34. an angle whose measure is exactly 90 degrees
  21. 36. a solid with a circular base connected to a vertex by a curved surface
  22. 38. outside an angle
  23. 39. part of a line with two endpoints
  24. 41. M is __________ two points A and B if and only if it is collinear with A and B and AM + MB = AB.
  25. 42. an angle that measures less than 90 degrees
  26. 43. a flat surface containing the set of all points extending in two dimensions to infinity
  27. 46. one of two parallel congruent faces of a polyhedron or a single face of a pyramid connected by triangular faces to a common vertex
  28. 51. Two geometric figures are _________ if they have the same size and shape.