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cate muchii si cate varfuri are o piramida cu 2013 fete?

Răspuns :

2013 fete = 1 baza + 2012 fete laterale
varfuri = 2012 varfuri ale bazei + 1 varf al piramidei = 2013 varfuri in total
muchii= 2012 muchii ale bazei + 2012 muchii laterale = 4024 muchi in total