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Cate muchii are un cub ? Cate muchii are o piramida triunghiulara ?

Răspuns :

Cubul are 12 muchii 
Piramida Triunghiulara are 6 muchii
Un cub are 4+4+4=4×3=12 muchii O piramida triunghiulara are 3+3=3×2=6 muchii.