circle review

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Across
  1. 2. a plane figure with at least three straight sides and angles, and typically five or more
  2. 9. the plane figure enclosed by two radii of a circle or ellipse and the arc between them
  3. 10. a triangle that has two sides of equal length
  4. 11. a plane figure with three straight sides and three angles
  5. 13. Two circles in the same plane if they intersect in exactly one point and the intersection of their interiors is not empty
  6. 15. a straight line that cuts a curve in two or more parts
  7. 17. having four straight sides
  8. 18. a circle that passes through all the vertices of the polygon
  9. 19. a plane figure with nine straight sides and nine angles
  10. 26. the center of the incircle of a triangle or other figure
  11. 27. a point or line common to lines or surfaces that intersect
  12. 28. a triangle that is enclosed by and "fits snugly" inside a circle
  13. 30. a plane figure with seven straight sides and angles
  14. 32. relating to the center of gravity
  15. 33. a line from the center of a regular polygon at right angles to any of its sides
Down
  1. 1. a plane figure with twelve sides
  2. 3. the trigonometric function that is equal to the ratio of the sides opposite and adjacent to an angle in a right triangle
  3. 4. a plane figure with eight straight sides and eight angles
  4. 5. at an angle of 90° to a given line, plane, or surface
  5. 6. a triangle in which all three sides are equal
  6. 7. a plane figure with five straight sides and five angles
  7. 8. a plane figure with four equal straight sides and four right angles
  8. 12. a plane figure with ten straight sides and angles
  9. 14. Two circles in the same plane if they intersect in exactly one point and their intersection of their interiors is empty
  10. 16. the enclosing boundary of a curved geometric figure, especially a circle
  11. 18. a straight line segment whose endpoints both lie on the circle
  12. 20. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere
  13. 21. a plane figure with six straight sides and angles
  14. 22. the angle between a side of a rectilinear figure and an adjacent side extended outward
  15. 23. the set of points which are an equal distance to a fixed point
  16. 24. the angle between adjacent sides of a rectilinear figure
  17. 25. a polygon that is equiangular and equilateral
  18. 29. divide into two equal parts
  19. 31. a straight line from the center to the circumference of a circle or sphere