Oblicz pole prostokata mając: a) a=7cm b=3dm b) a=2,7cm b=8cm c)a=8cm b= jest 3 razy dluzszy. Prosze o pomoc to zadanie na jutro 20.01.2012
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a)
b=3dm=30cm
a= 7 cm
P = 7*30 = 210 cm
b)
b=8 cm
a=2,7cm
P = 8*2,7= 21,6 cm
c)
b=8*3 cm=24 cm
a=8cm
P = 8*24= 192 cm
a 7cm= 0.7 dm
0.7dm *3dm= 2,1dm 2
b 2.7cm*8cm=21,6cm2
c 8cm*3= 24cm
8cm*24cm=192cm 2