a geometry problem inspired by Japanese Sangaku
![](https://i.ytimg.com/vi/-p1OnZiTTgU/mqdefault.jpg)
13:41
a famous geometry problem
![](https://i.ytimg.com/vi/Ezr1GY2gKns/mqdefault.jpg)
26:38
a very golden Fibonacci sum
![](https://i.ytimg.com/vi/VbUXHJmucMQ/mqdefault.jpg)
9:11
Sangaku: Japanese "Sacred Geometry"
![](https://i.ytimg.com/vi/l6woD-gzom4/mqdefault.jpg)
26:37
the complex derivative is strange...
![](https://i.ytimg.com/vi/-7Gt_IYAb0Q/mqdefault.jpg)
48:38
Geometry B Test 5
![](https://i.ytimg.com/vi/302eJ3TzJQU/mqdefault.jpg)
34:03
Introduction to Geometry
![](https://i.ytimg.com/vi/7IpMdJY7pco/mqdefault.jpg)
13:48
Very Nice Geometry Problem | You should be able to solve this | 2 Different Methods
![](https://i.ytimg.com/vi/pRV4WsM40AE/mqdefault.jpg)
13:48