a geometry problem inspired by Japanese Sangaku
13:41
a famous geometry problem
9:11
Sangaku: Japanese "Sacred Geometry"
19:24
Fascinating Property: The Tangent Line That Connects Circles and Ellipses
15:34
what fractions dream of
13:48
Simple yet 5000 years missed ?
11:23
my new favorite proof of this classic result
13:09
math professor explains viral square root problem
11:56