334


November 30– 334.

Geogebra. Ending the month with one last template from the Fukagawa/Rothman book on Japanese temple geometry – the Abe no Monjuin sangaku.

The tablet asks to find the radius of the small circles in terms of the sides of the triangles.

331


November 27 – 331.

Geogebra. This sangaku is intriguing because of the symmetrical aspect of its geometry. It asks to find the diameter of the smallest circle(s) in terms of the central circle(s).

328


November 24 – 328.

Geogebra. This sangaku is asking to find the size of the different segments making the upper left center triangle in the large rectangle. The reasoning works just as well with a square – and it makes for an interesting design too!