在△abc中,ab=ac,∠abd=∠acd,试说明ad与bc
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![在△abc中,ab=ac,∠abd=∠acd,试说明ad与bc](/uploads/image/z/7080267-3-7.jpg?t=%E5%9C%A8%E2%96%B3abc%E4%B8%AD%2Cab%3Dac%2C%E2%88%A0abd%3D%E2%88%A0acd%2C%E8%AF%95%E8%AF%B4%E6%98%8Ead%E4%B8%8Ebc)
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