Conc. interj. "Gheorghe Lazar" Sibiu 2010 probl. 1

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Andi Brojbeanu
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Conc. interj. "Gheorghe Lazar" Sibiu 2010 probl. 1

Post by Andi Brojbeanu »

Fie cubul \( ABCDA^{\prime}B^{\prime}C^{\prime}D^{\prime} \) cu muchia \( AB=2a \), iar \( M, N \) si \( P \) mijloacele muchiilor \( [AB] \), \( [BC] \) respectiv \( [DD^{\prime}] \). Sa se determine perimetrul si aria sectiunii formate de planul \( (MNP) \) in cubul dat.
E:13918, G.M. Nr. 11/2009
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