Naoharu Ito and Harald K. Wimmer, A sangaku-type problem with regular polygons, triangles, and congruent incircles,
Forum Geometricorum, 13 (2013) 185--190.
Abstract. We consider a dissection problem of a regular $n$-sided polygon that generalizes Suzuki's problem of four congruent incircles in an equilateral triangle.
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