Răspunsuri

2014-10-09T23:42:34+03:00
Un cub are 12 laturi 
S= 12l= 129 cm
⇒ l= 129:12 ⇒ l cub= 10,75 cm

Arie baza= l²= (10,75)²= 10,75×10,75= 115,5625 cm²
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