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如图,BD平分∠ABC,且AB=4,BC=6,则当BD=________时,△ABD∽△DBC.
如图,
如图,BD平分∠ABC,且AB=4,BC=6,则当BD=_________时,△ABC∽△DBC.
如图,△ABC中,∠C=90°,AD平分∠BAC交BC于D,若BC=32,且BD∶CD=9∶7,则D到AB的距离DE为________.