# Johnson Circles

- Author:
- Bill Lombard

- Topic:
- Circle

Johnson Circles
If three hula hoops (circles of equal radii) intersect at a common point,
then a fourth hoop (same size circle) will cover their remaining intersections.
credit: Greg Ross
http://www.futilitycloset.com/2011/09/22/johnson-circles/
https://en.wikipedia.org/wiki/Johnson-circles