circle's facts

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Across
  1. 1. a line segment whose endpoints both lie on a circle
  2. 4. a plane figure with six equal straight sides
  3. 5. a four-sided figure.
  4. 7. a plane figure with at least three straight sides and angles, and typically five or more.
  5. 8. a plane figure with seven equal straight sides
  6. 11. divide (a line, angle, shape, etc.) into two equal parts.
  7. 12. a point or line common to lines or surfaces that intersect.
  8. 15. a plane figure with eight equal straight sides
  9. 17. the angle between adjacent sides of a rectilinear figure.
  10. 18. a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length)
  11. 20. a plane figure with nine equal straight sides
  12. 24. a plane figure with twelve equal straight sides
  13. 25. In geometry it usually means drawing one shape inside another so that it just touches
  14. 27. a plane figure with three straight sides and three angles.
  15. 28. a circle that passes though all the vertices of the polygon
  16. 30. the distance from the centre to a chord in a circle
  17. 31. two circles is a tangent of both circles that intersects the segment joining the centers of two circles.
  18. 32. a straight line from the center to the circumference of a circle or sphere.
  19. 33. the plane figure enclosed by two radii of a circle or ellipse and the arc between them.
Down
  1. 2. a plane figure with ten equal straight sides
  2. 3. the intersection of the angular bisector of a triangle
  3. 6. the angle between a side of a rectilinear figure and an adjacent side extended outward.
  4. 9. a plane figure with five equal straight sides
  5. 10. a line touching only a point on a circle
  6. 13. a plane figure with four equal straight sides
  7. 14. a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
  8. 16. at an angle of 90° to a given line, plane, or surface.
  9. 17. A triangle with two equal sides.
  10. 19. they intersect in exactly one point and their intersection of their interiors is empty.
  11. 21. the center of the incircle of a triangle or other figure
  12. 22. the set of points which are an equal distance to a fixed point
  13. 23. A triangle with all three sides of equal length
  14. 26. a line cutting through a circle
  15. 29. the enclosing boundary of a curved geometric figure, especially a circle.