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geometry

Tracked in 42 AFBytes stories. First seen May 28, 2026. Last seen Jun 03, 2026.

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Semi-Circles Within a Circle

Here is a puzzle from Catriona Shearer. Find the area ratio of the shaded semi-circles to the circle which they fit in. The bases of the semi-circles are...

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From Pentagons to Pentagrams

I recently showed you that if you take the regular icosahedron: considered in a coordinate system based on the golden ratio, and then replace √5 by -√5 in a...

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