Vocab cross puzzle

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