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obw.= 2*2+ 2*5=4+10= 14cm
5/4 *14= 70/4= 17,5 cm
odp. obwód tego prostokąta w skali 5/4 wynosi 17,5 cm.
prosze ;p
obwód prostokąta=2x2cm+2x5cm=4+10=14cm
a w skali 5/4 to jest:
14 x 5/4=70/4=17,5 cm