CIRCLE

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Across
  1. 1. the diameter is a___
  2. 4. the set of points which are an equal distance to a fixed point
  3. 6. the half of the diameter
  4. 7. 12 sides polygon
  5. 9. when two lines meet
  6. 12. a shape consisted of three equal-length sides
  7. 16. 10 sides polygon
  8. 17. a triangle that has all 3 vertices on a circle
  9. 20. split something into 2 identical parts
  10. 24. an angle located at the outside of a circle
  11. 28. a point where all perpendicular bisector of a triangle meet
  12. 29. a line passing through a circle at 1 point
  13. 31. when two circle are meeting at only 1 point, and they are located at the same side of their common tangent line
  14. 32. 8 sides polygon
  15. 33. 9 sides polygon
Down
  1. 1. a circle that passes through all the vertices of a polygon
  2. 2. a polygon with equal-length sides
  3. 3. a shape with multiple sides
  4. 5. the longest chord of a circle
  5. 8. 5 sides polygon
  6. 10. a triangle that has two equal-length sides
  7. 11. 90 degrees
  8. 13. an angle located at the inside of a circle
  9. 14. the distance between the centre of a circle and its chord
  10. 15. a part of a circle
  11. 18. the perimeter of a circle
  12. 19. when two circle are meeting at only 1 point, and they are located at two distinct sides of their common tangent line
  13. 21. a special rectangle
  14. 22. a four sided polygon
  15. 23. 7 sides polygon
  16. 25. a point where all angular bisector of a triangle meet
  17. 26. 6 sides polygon
  18. 27. a polygon with 3 sides
  19. 30. a line passing through a circle at 2 points