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obwód ma 45 a dwie równoległe ściany 16
45-16=29
29:2= 14,5
i teraz 14,5*8=116
:)
a=?
b=8
2a+2b=45
2a+2*8=45
2a=45-16
2a=27
a=13,5
P=a*b
P=13,5*8
p=108 m²