如图,△ABC中,∠C =90o,AC=BC,AD平分∠BAC,求证:AB=AC+DC.如图,△ABC中,∠C =90o,AC=BC, AD平分∠BAC,求证:AB=AC+DC.若AB=15,则△BED的周长是多少?本题第一问我已经知道了,过点D作DE⊥AB.我要知道若AB=15,
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![如图,△ABC中,∠C =90o,AC=BC,AD平分∠BAC,求证:AB=AC+DC.如图,△ABC中,∠C =90o,AC=BC, AD平分∠BAC,求证:AB=AC+DC.若AB=15,则△BED的周长是多少?本题第一问我已经知道了,过点D作DE⊥AB.我要知道若AB=15,](/uploads/image/z/10366190-62-0.jpg?t=%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0C+%3D90o%2CAC%3DBC%2CAD%E5%B9%B3%E5%88%86%E2%88%A0BAC%2C%E6%B1%82%E8%AF%81%3AAB%3DAC%2BDC.%E5%A6%82%E5%9B%BE%2C%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0C+%3D90o%2CAC%3DBC%2C+++++++++++AD%E5%B9%B3%E5%88%86%E2%88%A0BAC%2C%E6%B1%82%E8%AF%81%3AAB%3DAC%2BDC.%E8%8B%A5AB%3D15%2C%E5%88%99%E2%96%B3BED%E7%9A%84%E5%91%A8%E9%95%BF%E6%98%AF%E5%A4%9A%E5%B0%91%3F%E6%9C%AC%E9%A2%98%E7%AC%AC%E4%B8%80%E9%97%AE%E6%88%91%E5%B7%B2%E7%BB%8F%E7%9F%A5%E9%81%93%E4%BA%86%2C%E8%BF%87%E7%82%B9D%E4%BD%9CDE%E2%8A%A5AB.%E6%88%91%E8%A6%81%E7%9F%A5%E9%81%93%E8%8B%A5AB%3D15%2C)
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