November 1 – 305.

Moving from JavaView to GeoGebra. Geogebra is a mathematics software designed for mathematics students that creates beautiful visual outcomes. As an anchor to this month’s exploration, I ‘ll use some Sangaku geometry problems from the library of Alex Bogolmony available at cut-the-knot-.org. Sangaku were meant to address two-dimensional geometry problems. Treating the same problems in a 3D environment is bound to bring some unexpected surprises…

This first – sangaku – is called – Three Tangent Circles sangaku. Given three circles tangent to each other and to a straight line, find the radius of the middle circle via the radii of the other two…

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