Circle Review Roy

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Across
  1. 4. a closed 2d figure enclosed by four uncrossed line segments that are not on the same straight line
  2. 6. one line is at a right angle to the other
  3. 8. the distance from the center to the circumference
  4. 14. the triangle that each side are equal and each interior angle are equal too
  5. 15. a polygon with seven sides and seven angles
  6. 17. a parallelogram which adjacent sides are equal and one angle is a right angle
  7. 18. the line segment between two points on the circle
  8. 19. a closed graph formed by the sequential connection of three line segments that are not on the same straight line
  9. 21. a line has only one common point of a circle
  10. 23. one line segment divided into two equal line segments
  11. 24. distance from the chord to the center
  12. 25. d=R-r
  13. 26. a polygon with ten sides and ten angles
  14. 28. the angle between two adjacent sides’ extension cord of a polygon
  15. 30. the triangle which three vertices are all on the circumference
  16. 31. three midlines’ node in a triangle
  17. 32. a straight line and an arc have two common points
  18. 33. the longest chord in a circle
Down
  1. 1. a pattern formed by an arc and two radii passing through each end of the arc
  2. 2. a pattern formed by three or more than three sides
  3. 3. a moving point moves a circle around a fixed point for a certain distance
  4. 5. a polygon with twelve sides and twelve angles
  5. 7. a polygon with equal sides and angles
  6. 9. one line and one circle or two circles have two common points
  7. 10. the circumference is intersected with the vertices of the polygon
  8. 11. d=R+r
  9. 12. a polygon with eight sides and eight angles
  10. 13. a polygon with five sides and five angles
  11. 16. the triangle that at least two sides are equal
  12. 20. three angle bisectors’ node in a triangle
  13. 22. the angle between two adjacent sides of a polygon
  14. 27. a polygon with nine sides and nine angles
  15. 29. a polygon with six sides and six angles