Given that the line segment AB = 1cm, extend AB to point C to make BC = 2Ab, and then extend Ba to point d to make ad = 3AB, then DC = () cm, DB = () cm, Da = () cm

DC=AD+AB+BC=3AB+AB+2AB=6AB=6cm
DB=DA+AB=3AB+AB=4AB=4cm
DA=3AB=3cm

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