Geometry Terms Crossword Puzzle

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