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Calculati aria suprafeti totale a unui cuboit cu dimensiunile de

A)4cm 6,5cm 8cm
B)5cm 7,2 cm 10cm


Răspuns :

A) aria=2(4+6,5+8)=37cm
B)aria=2(5+7,2+10)=44,4 cm
aria totala=2(ab+bc+ac)
 At=2(L*l+L*h+l*h)

a)At=2(8*6,5+8*4+6,5*4)⇒2(52+32+26)⇒2*110⇔220

b)At=2(10*7,2+10*5+7.2*5)⇒2(72+50+36)⇒2*158⇔316