Circle

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Across
  1. 3. a part of a circle lying between two straight lines drawn from the centre to the edge
  2. 6. a flat shape with ten straight sides and ten angles
  3. 9. a flat shape with seven straight sides and seven angles
  4. 11. a triangle with two of its three sides the same length
  5. 14. a flat shape that has five sides
  6. 16. a circle that contains a polygon inside
  7. 18. a polygon which all the length of the sides are equal
  8. 19. a triangle inside a circle that the three apexes all touch the circumference
  9. 20. an angle formed between the side of a shape and the side next to it
  10. 24. a flat shape with nine straight sides and nine angles
  11. 27. the line that goes around the circle
  12. 29. Two circles are tangency on the outside
  13. 30. a flat shape with twelve straight sides and twelve angles
  14. 31. the longest chord in a circle
  15. 32. a straight line that cuts a curve in two or more parts
Down
  1. 1. a quadrilateral which all the sides are the same length
  2. 2. forming an angle of 90° with another line or surface
  3. 4. a straight line that joins two points on a curve
  4. 5. a flat shape with at least three straight sides and angles, and usually five or more
  5. 7. a straight line that touches the outside of a curve but does not cross it
  6. 8. the perpendicular from the centre of a regular polygon to one of the sides
  7. 10. a polygon that has three sides
  8. 12. a triangle whose three sides are all the same length
  9. 13. Two circles are tangency and one is inside of another one
  10. 15. an angle formed inside a shape where two sides of the shape meet
  11. 17. a flat shape with eight straight sides and eight angles
  12. 21. a flat shape with four straight sides
  13. 22. a straight line between the centre of a circle and any point on its outer edge
  14. 23. a flat shape with six straight sides and six angles
  15. 25. the point where all the diagonals meet
  16. 26. to divide sth into two equal parts
  17. 28. the centre of a inscribed circle