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.
November 29– 333
Geogebra. 3 circles are in line. Find the size of the center circle in terms of the left and right circles.
November 28 – 332.
Geogebra. The original sangaku tablet asked to find the size of the larger cube in terms of the two spheres – as in the lower right part of the image.
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).
November 26 – 330.
Geogebra. A sangaku that asked to find the size of the small green circles in terms of the largest (red) minus the smallest (blue) circles.
November 25 – 329.
Geogebra. This sangaku asks to find the size of the circles in term of each other.
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!