Across
- 3. Line segment joining two points on a curve
- 4. Half a circle
- 8. Circles with a common center
- 9. Double the radius
- 11. A line passing through two points of a curve
- 12. Straight line (outside a circle) that just touches the curve at that point
- 14. Half the diameter
Down
- 1. Angle with endpoints located on a circle's circumference and vertex located at the circle's center
- 2. Smooth (outer) curve joining two points
- 5. Equidistant to all outer points
- 6. Distance around circle
- 7. Number that never ends
- 10. Angle when two chords intersect
- 13. A shape made of two circles