👤

aflat aria totala laterala si volumul prismei patrulaterel egal cu 12cm si h egal4


Răspuns :

V = Ab·h
12 = Ab·4
Ab = 12:4
Ab = 3 cm.
Ab = l²
3 = l²
l = √3
Pb = 4l
Pb = 4√3
Al = Pb·h
Al = 4√3·4
Al =16√3 cm²
At = Al+2Ab
At = 16√3 + 2·3
At = 16√3 + 6 cm²