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Title: | Proof without words : the parallelogram with maximum perimeter for given diagonals is the rhombus | Authors: | Plaza, Àngel | UNESCO Clasification: | 12 Matemáticas | Issue Date: | 2016 | Journal: | Mathematics Magazine | Abstract: | By using the ellipse with foci at the extreme points of the shortest diagonal and the minor axis being the longest diagonal, it is proved without words that the parallelogram with maximum perimeter for given diagonals is the rhombus. | URI: | http://hdl.handle.net/10553/42428 | ISSN: | 0025-570X | DOI: | 10.4169/math.mag.89.4.251 | Source: | Mathematics Magazine [ISSN 0025-570X], v. 89 (4), p. 251 |
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