TY - JOUR T1 - On rotations of geometrical figures A1 - Krech, Ireneusz JA - Obzory matematiky, fyziky a informatiky Y1 - 2014 VL - 43 IS - 3 SP - 21 EP - 24 SN - 1335-4981 N2 - The paper presents some original solutions to a certain problem by rolling coins (circles) derived from a book by David Wells The Penguin Book of Curious and Interesting Puzzles, and also proposes several generalizations of the problem. ER - |