Sangaku, Japanese Geometry Problems  Table of Content




Dynamic Geometry 1480.
Japanese Theorem for Cyclic Polygon, Sangaku, Triangulation, Nonintersecting Diagonals, Sum of Inradii, Invariant, Stepbystep Illustration. GeoGebra,
iPad. 

Dynamic Geometry 1452.
Japanese Theorem, Sangaku,
Cyclic Quadrilateral, Incenter, Rectangle, Inradius. Stepbystep
illustration using GeoGebra. 

Geometry Problem
1103.
Right Triangle, Incircle, Inscribed Circle, Radius, Geometric Mean, Sangaku, Japanese, Metric Relations. 

Geometry Problem
1099.
Four Circles, Common External Tangent, Common Internal Tangent, Radius, Metric Relations,
Sangaku Japanese Geometry. 

Geometry Problem
1093.
Square, Circle, Tangent, Radius, Side, Sangaku, Japanese Geometry Problem. 

Geometry Problem
1092.
Equilateral Triangle, Square, Circle, Tangent, 90 Degree, Sangaku,
Japanese Problem. 

Geometry Problem
1081.
Equilateral Triangle, Inscribed Circle, Inradius, Tangent Circles, Radius, Tangent Line, Sangaku Japanese Problem. 

Geometry Problem
1080.
Square, Circle, Tangent, Side, Radius, Metric Relations. 

Geometry Problem
1077.
Chain of Equal Tangent Circles, Circular Sector, Area, Sangaku, Sacred Geometry. 

Problem 525.
Sangaku Japanese Geometry,
Circles, Diameter, Tangent, Radius,
Congruence, Measurement. 

Sangaku Problem 525, iPad apps.
Sangaku Japanese Geometry. 

Problem 524.
Sangaku Japanese Geometry, Circle, Equilateral Triangles, Midpoint, Side, Measurement. 

Problem 336.
Two equal circles, a Common Tangent and a Square, Sangaku Japanese Geometry. 

Sangaku
Problem 41.
"Mickey Mouse." Three circles, tangents, radii. 

Sangaku Three circles and a tangent line. 

Geometry Problem 1154. Sangaku Three circles and a tangent line. 

Art
1: Sangaku Three circles and a tangent line. 

Sangaku
Geometry Theorem: Cyclic Quadrilateral
Inradii, Rectangle. 

Sangaku Problem (An Old Japanese Theorem)
Inradii, Carnot's theorem. 

Puzzle: Sangaku Problem 
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May 16, 2020
