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Equilateral into 13 Isosceles triangles

Ed Pegg, Wolfram Research
Posted 6 years ago

7 years ago William Somsky showed me how to divide an equilateral triangle into 13 strictly acute isosceles triangles.

When I noticed the image, I realized I could now solve it exactly. Seems to need roots of order 10 polynomials.

Somsky 13

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