Publications of (and about) Paul Erdös
Autor: Bankoff, Leon; Erdös, Paul; Klamkin, Murray S.
Title: The asymmetric propeller. (In English)
Source: Math. Mag. 46, 270-272 (1973).
Review: Two proofs are given of the theorem: if OAB, OCD and OEF are equilateral triangles of the same orientation then the midpoints of BC, DE and FA are the vertices of an equilateral triangle.
Classif.: * 51F99 Metric geometry
52A10 Convex sets in 2 dimensions (including convex curves)
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