oblicz powierzchnie prostopadłościanów o wymiarach a.12cm,6cm,8cm b,1,5dm,12cm,0,2m/w dm-kwadratowe/ c.1,6dm,10cm,8cm/pole w cm kwadratowych/
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a.PP=12*6=72 cm2 ps=6*8=48cm2 ps=12*8=96 pc=72+96+48=216 cm2
b.0,2m=2dm pp=2*1,2=2,4 dm2 ps= 1,5*1,2=1,8
12cm=1,2 dm ps=2*1.5=3 dm2 pc=2,4+1,8+3=7,2 dm2
c.1,6dm=16 cm pp=16*10=160cm2 ps=8*10=80 cm2 ps=16*8=128cm2 pc=160+80+128=368 cm2