平行四边形ABCD的周长为36cm，若AB：BC=1：5，则AB=__cm BC=_cm；

平行四边形ABCD的周长为36cm，若AB：BC=1：5，则AB="____cm" BC=___cm；

答案

3，15解析:
∵平行四边形ABCD的周长为36cm
∴AB+BC=36÷2=18cm…（1）
又∵AB：BC=1：5…（2）
∴由（1）（2）可得：AB=3cm，BC=15cm

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平行四边形ABCD的周长为36cm，若AB：BC=1：5，则AB=____cm BC=___cm；

答案

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平行四边形ABCD的周长为36cm，若AB：BC=1：5，则AB=__cm BC=_cm；