Revision history of "1980 Canadian MO Problems/Problem 5"

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  • (cur | prev) 11:28, 2 March 2020Ellentilburg (talk | contribs). . (249 bytes) (+249). . (Created page with "== Problem == A parallelepiped has the property that all cross sections, which are parallel to any fixed face <math>F</math>, have the same perimeter as <math>F</math>. Dete...")