Geometry

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Across
  1. 4. half of a circle
  2. 7. the point where tangency meets the circle
  3. 12. a part of the circumference
  4. 13. The angle in the middle of the cricle.
Down
  1. 1. something round
  2. 2. a straight line segment
  3. 3. assosiated with less than half of a rotation
  4. 5. a line through the circle
  5. 6. one whose legs are seecant of the circle
  6. 8. connecting two end points
  7. 9. line through the center of the circle
  8. 10. a line passing through two points of a curve
  9. 11. a line touching a cricle