Sangaku, Japanese Geometry Problems - Table of Content

Dynamic Geometry 1480.
Japanese Theorem for Cyclic Polygon, Sangaku, Triangulation, Non-intersecting Diagonals, Sum of Inradii, Invariant, Step-by-step Illustration. GeoGebra, iPad.

Dynamic Geometry 1452.
Japanese Theorem, Sangaku, Cyclic Quadrilateral, Incenter, Rectangle, Inradius. Step-by-step 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