Vocab cross puzzle

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Across
  1. 2. a segment that connects two consecutive vertices
  2. 4. a polygon with nine sides
  3. 5. the difference around a circle
  4. 7. a quadrilateral with two pairs of parallel sides
  5. 11. each segment that forms a polygon is called a _____ of a polygon
  6. 12. a quadrilateral with four right angles
  7. 15. a segment whose endpoints are midpoints
  8. 16. a polygon with seven sides
  9. 18. a circle that contains all of the vertices of a polygon is _______ around the polygon
  10. 20. when there are three or more lines that intersect
  11. 21. two angles that add up to be 180 degrees
  12. 23. a ______ polygon is equilateral and quadrangular
  13. 24. a quadrilateral with exactly two pairs of congruent consecutive sides
Down
  1. 1. cordinates that are on the same plane
  2. 3. a quadrilateral with one pair of parallel sides
  3. 6. two angles that add up to be 90 degrees
  4. 8. a quadrilateral with all four of the sides being congruent congruent
  5. 9. a triangle with one right angle is called a ____ triangle
  6. 10. a common endpoint of two sides is called _____ of a polygon
  7. 13. if a diagonal has one or more points in the exterior of the polygon
  8. 14. a set of points that satisfies a given condition
  9. 17. a triangle with one obtuse angle is called an ____ triangle
  10. 19. a quadrilateral with four right angles and four congruent sides
  11. 20. if a diagonal has no points in the exterior of the shape
  12. 22. a triagnle with three acute angles is an _____ triangle