6: Circles
( \newcommand{\kernel}{\mathrm{null}\,}\)
- 6.4: Circumference
- Find the circumference of a circle using the formulas: C = πd; C = 2πr.
Thumbnail: A circular sector is shaded in green. Its curved boundary of length L is a circular arc. (CC BY-SA 3.0; Cburnett via Wikipedia)