Geometry Crossword Puzzle Project

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Across
  1. 4. in the same plane.
  2. 5. a plane figure with at least three straight sides and angles, and typically five or more.
  3. 6. Postulate is a true statement, which does not require to be proved.
  4. 8. a ray on the opposite of the other ray
  5. 12. the enclosing boundary of a curved geometric figure, esp. a circle.
  6. 14. an angle less than 90 degrees but more than 0 degrees
  7. 15. Both of two angles whose sum is 90°
  8. 18. a point or line common to lines or surfaces that intersect.
  9. 19. having all its sides of the same length.
Down
  1. 1. the figure formed by two rays sharing a common endpoint.
  2. 2. The two supplementary adjacent angles formed by two intersecting lines
  3. 3. the exact middle point.
  4. 7. Line segments that have the same length.
  5. 9. having equal angles.
  6. 10. the characterization and study of sets of points based only on given values of the distances between member pairs.
  7. 11. Both of two angles whose sum is 180°
  8. 13. the continuous line forming the boundary of a closed geometric figure.
  9. 15. (of points) lying in the same straight line.
  10. 16. a line segment is a part of a line that is bounded by two end points, and contains every point on the line between its end points.
  11. 17. the use of algebra to study geometric properties; operates on symbols defined in a coordinate system
  12. 20. A ray is a line that starts at a given point and goes off for ever in some direction.