Geometry Terms Crossword Puzzle

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Across
  1. 7. An example used to prove that an if-then statement is false
  2. 9. The set of all points
  3. 10. A chord that contains the center of a circle
  4. 13. A plane figure formed by coplanar segments
  5. 14. The set of points in a plane that are a given distance from a given point in the plane
  6. 16. A quadrilateral with both pairs of opposite sides parallel
  7. 17. The figure formed by three segments joining three noncollinear points
  8. 19. A line that intersects two or more coplanar lines in different points
  9. 20. A segment joining 2 non-consecutive verticals of a polygon
Down
  1. 1. An angle with measure between 90 and 180
  2. 2. A statement that can be proved
  3. 3. A statement that contains the words "if and only if"
  4. 4. A statement that is accepted without proof
  5. 5. Two angles in a plane that have a common vertex and a common side but no common interior points
  6. 6. An angle with measure between 0 and 90
  7. 8. A 4-sided polygon
  8. 11. A quadrilateral with four right angles and four congruent sides
  9. 12. An 8-sided polygon
  10. 15. A segment whose endpoints lie on a circle
  11. 18. A figured formed by 2 rays that have the same endpoint