Circle

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