Despite the visualizations, I found the mathematical solution described here [0] quite convincing. [0] https://math.stackexchange.com/questions/1351058/circle-

Despite the visualizations, I found the mathematical solution described here [0] quite convincing. [0] https://math.stackexchange.com/questions/1351058/circle-revolutions-rolling-around-another-circle https://math.stackexchange.com/questions/1351058/circle-revo...