Circle

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