Math Crossword

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

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.