Across
- 3. straight line extending from the center of a circle or sphere to the circumference or
- 4. straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end.
- 6. ratio itself: 3.141592+.
- 8. having or arranged in the form of a half of a circle.
- 11. angle- angle formed by two chords in a circle which have a common endpoint
- 12. the space between two concentric circles on a plane.
- 13. line- a straight line joining two points on a function
- 15. line-plane curve at a given point is the straight line that "just touches" the curve at that point
Down
- 1. outer boundary, especially of a circular area; perimeter:
- 2. the line segment between two points on a given curve
- 5. angle with endpoints and located on a circle's circumference and vertex located at the circle's center
- 7. circles- circles with a common center
- 9. angle-
- 10. . the middle point, as the point within a circle or sphere equally distant from all points of the circumference or surface, or the point within a regular polygon equally distant from the vertices.
- 14. any unbroken part of the circumference of a circle or other curved line.