The Susaka Triangle of Japanese Temple Geometry
- Newcomb Greenleaf
This is the Susaka Triangle of Japanese Temple Geometry. It is Problem 47 in the chapter of Easier Problems in the book Sacred Mathematics: Japanese Temple Geometry by Fukagawa and Rothman. Drag the point A and watch the blue square.
Notice how the point P, which determines the blue square, moves along the arc between C and D.