Chapter One

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Across
  1. 2. Three-dimensional figure in space bounded by polygons
  2. 5. Polygon bounded by five sides
  3. 6. Euclid described it as a "breadthless length" that extends without end in both directions
  4. 8. Polygon bounded by eight sides
  5. 11. Set of all points in a plane that are a fixed distance from a given point in the plane
  6. 14. Pair of rays that have the same endpoint
  7. 15. Type of reasoning based on logic
  8. 16. Polygon bounded by three sides
  9. 18. Tool for drawing line segments
  10. 19. Polygon bounded by six sides
  11. 20. Word derived from Greek words for "earth" and "measure"
  12. 21. Points that are contained in the same plane
  13. 25. Geometric drawings
  14. 26. Tool for measuring the degrees in an angle
  15. 28. Points that are contained by the same line
  16. 29. Part of a line bounded by two endpoints
  17. 30. The shared endpoints of two rays that form an angle
Down
  1. 1. Two-dimensional figure in a plane bounded by line segments
  2. 3. Points that are not contained by any single line
  3. 4. Part of a line that extends endlessly in one direction
  4. 7. The man who first presented geometry as a logical system of connected ideas
  5. 9. Point where two lines meet
  6. 10. Sum of the lengths of all sides
  7. 12. Title of the book written by Euclid circa 600 B.C.
  8. 13. Geometric element that is a location only
  9. 17. The number of unit-squares equal in measure to its surface
  10. 21. Lines that contain the same point
  11. 22. Distance between the center of a circle and any point on it
  12. 23. Polygon bounded by four sides
  13. 24. Type of reasoning based on observations
  14. 27. Flat unbounded surface
  15. 28. Tool used for drawing circles and arcs