Un cerchio rotolante quadra se stesso
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Elsner T. (1977). The Rolling Circle Squares Itself, Mathematics Magazine, 50 (3) 162. DOI: 10.2307/2689507![]()
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Elsner T. (1977). The Rolling Circle Squares Itself, Mathematics Magazine, 50 (3) 162. DOI: 10.2307/2689507