1. The circumference & the circle

2. Elements of the circumference Centre (UK) / center (US)

3. Elements of the circumference Arch

4. Elements of the circumference

5. radius

6. Elements of the circumference Diameter

7. Elements of the circumference chord

8. Elements of the circle semicircle

9. Elements of the circle Circular sector

10. Elements of the circle Circular segment

11. Related positions between two circumferences OUTER TANGENTS INNER TANGENTS SECANT INNER CONCENTRIC

12. RELATED POSITIONS BETWEEN CIRCUMFERENCE AND STRAIGHT LINE OUTER TANGENT SECANT 90º

13. Circles in art

14. Circles in design

15. Another circles