Cardioid Challenge
Challenge from @geogebra:
Let's help @fawnpnguyen: "I want to learn how to make this animated cardioid http://visualizingmath.tumblr.com/post/54942452146/matthen-a-cardioid-a-lovely-mathsy-heart …" #challenge-of-the-day #geogebra
https://twitter.com/geogebra/status/354714406380257280
Originally by matthen
A Cardioid, a lovely mathsy heart shape, can be constructed as shown in the animation as the combination of many circles generated from a single underlying circle. This shape describes the sensitivity regions of many directional microphones.
http://visualizingmath.tumblr.com/post/54942452146/matthen-a-cardioid-a-lovely-mathsy-heart