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|AB|/|CD|=25/2:5=5/2=2,5
|AB|=30 cm=3 dm , |CD|=5 dm
|AB|/|CD|=3/5
|AB|=1¾ cm =1,75 cm=17,5 mm, |CD|=35 mm
|AB|/ |CD|=17,5 /35=1/2
oblicz stosunek długości odcinków AB i CD