Circle

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Across
  1. 2. a ten-sided polygon
  2. 11. is any five-sided polygon
  3. 15. two lines which meet at a right angle
  4. 16. a polygon with three edges and three vertices
  5. 18. distance around the edge of a circle
  6. 20. a triangle center
  7. 22. the portion of a disc enclosed by two radii and a circular arc
  8. 25. half of diameter
  9. 26. two circle intersect in exactly one point and the intersection of their interiors is not empty.
  10. 27. a plane shape with straight sides
  11. 28. the longest chord
  12. 32. between any side of a shape
  13. 33. a nine-sided polygon
Down
  1. 1. a seven-sided polygon
  2. 3. circle a circle that passes through all the vertices of the polygon
  3. 4. A ∩ B of two sets A and B is the set that contains all elements of A that also belong to B
  4. 5. a polygon with four edges and four vertices
  5. 6. a triangle in which all three sides are equal
  6. 7. a line that intersects the curve in at least two (distinct) points
  7. 8. a shape with 4 equal sides and every angle is a right angle
  8. 9. the angle between adjacent sides of a rectilinear figure.
  9. 10. a twelve-sided polygon
  10. 12. the center of mass
  11. 13. each vertex of the triangle lies on the circle
  12. 14. a triangle that has two sides of equal length
  13. 17. two circle intersect inexactly one point and their intersection of their interiors is empty
  14. 19. a six-sided polygon
  15. 21. a straight line segment whose endpoints both lie on the circle.
  16. 23. a line which touches a circle or ellipse at just one point
  17. 24. a polygon that is equiangular and equilateral
  18. 29. a line segment from the center to the midpoint of one of its sides
  19. 30. an eight-sided polygon
  20. 31. divide into two equal parts