ex.12 va rog frumos!!!

Ex12 Va Rog Frumos class=

Răspuns :

a)A=8*5=40
b)P=2*8+2*5=26
c)V=3*5*8=15*8=120
a) aria desfasurarii=Atotala a paralelipedului=2(Lxl+Lxh+lxh)=2(8x5+8x3+5x3)=2(40+24+15)=2x79=158[tex] cm^{2} [/tex]
b) Pdesfasurarii=4xL+2xl+8xh=4x8+2x5+8x3=32+10+24=66cm
c) Vparalelipiped=Lxlxh=8x5x3=120[tex] cm^{3} [/tex]