Oblicz pole powierzchni prostopadłościanu o wymiarach
a) 4,3,6 cm
b) 7,7,5 dm
c) 12,3,9 cm
4) 4 m,2 dm, 8 dm
a) P=2ab+2bh+2ah
P=2(4*3)+2(3*6)+2(4*6)=24+32+48=104cm^2
b)
P=2(7*7)+2(7*5)+2(7*5)=98+70+70=238dm^2
c)P=2(12*3)+2(12*9)+2(3*9)=72+216+54=342cm^2
d)4m=40dmP=2(40*2)+2(2*8)+2(40*8)=160+32+640=832dm^2
P = 2ab + 2bc + 2ac
a)
P= 2*4*3 + 2*3*6 + 2*6*4 = 24 + 36 + 48 = 108 cm2
P=2*7*7 + 2*7*5 + 2*5*7 = 98 + 70 + 70 = 238 dm2
c)
P= 2*12*3 + 2*3*9 + 2*9*12 = 72 + 54 + 216 = 342 cm2
4)
a=4m b= 2 dm = 0,2m c=8 dm = 0,8 m
P= 2*4*0,2 + 2*0,2*0,8 + 2*0,8 * 4 = 1,6 + 0,32 + 6,4 = 8,32 m2
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a)
P=2ab+2bh+2ah
P=2(4*3)+2(3*6)+2(4*6)=24+32+48=104cm^2
b)
P=2(7*7)+2(7*5)+2(7*5)=98+70+70=238dm^2
c)
P=2(12*3)+2(12*9)+2(3*9)=72+216+54=342cm^2
d)
4m=40dm
P=2(40*2)+2(2*8)+2(40*8)=160+32+640=832dm^2
P = 2ab + 2bc + 2ac
a)
P= 2*4*3 + 2*3*6 + 2*6*4 = 24 + 36 + 48 = 108 cm2
b)
P=2*7*7 + 2*7*5 + 2*5*7 = 98 + 70 + 70 = 238 dm2
c)
P= 2*12*3 + 2*3*9 + 2*9*12 = 72 + 54 + 216 = 342 cm2
4)
a=4m b= 2 dm = 0,2m c=8 dm = 0,8 m
P= 2*4*0,2 + 2*0,2*0,8 + 2*0,8 * 4 = 1,6 + 0,32 + 6,4 = 8,32 m2