Oblicz pole powierzchni prostopadłościanu o wymiarach: a)4cm, 3cm, 6cm b)7dm, 7dm, 5dm c)12cm, 3cm, 9cm d)4m, 2dm, 8dm

a) a=4cm b=3cm c=6cm Pc=2*a*c+2*a*b+2*b*c Pc=2*4cm*6cm+2*4cm*3cm+2*3cm*6cm= 48cm+24cm+36cm=108cm2 b) a=7dm b=7dm c=5dm Pc=2*a*c+2*a*b+2*b*c Pc=2*7dm*5dm+2*7dm*7dm+2*7dm*5dm=70dm+98dm+70dm= =238dm2 c) a=12cm b=3cm c=9cm Pc=2*a*c+2*a*b+2*b*c Pc=2*12cm*6cm+2*12cm*3cm+2*3cm*6cm=144cm+72cm+36cm= =252cm2 d) a=4m=40dm b=2dm c=8dm Pc=2*a*c+2*a*b+2*b*c Pc=2*40dm*8dm+2*40dm*2dm+2*2dm*8dm=640dm+160dm+32dm= =832dm2 Licze na naj