三角形ABC内有一点D,DA=DC,BD=BA.∠BAC=2∠ACB,1当∠BAC=90时,∠DBC与∠ABC的关系?2.当∠BAC不等于90时,∠DBC与∠ABC的关系?
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![三角形ABC内有一点D,DA=DC,BD=BA.∠BAC=2∠ACB,1当∠BAC=90时,∠DBC与∠ABC的关系?2.当∠BAC不等于90时,∠DBC与∠ABC的关系?](/uploads/image/z/5290822-46-2.jpg?t=%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%86%85%E6%9C%89%E4%B8%80%E7%82%B9D%2CDA%3DDC%2CBD%3DBA.%E2%88%A0BAC%3D2%E2%88%A0ACB%2C1%E5%BD%93%E2%88%A0BAC%3D90%E6%97%B6%2C%E2%88%A0DBC%E4%B8%8E%E2%88%A0ABC%E7%9A%84%E5%85%B3%E7%B3%BB%3F2.%E5%BD%93%E2%88%A0BAC%E4%B8%8D%E7%AD%89%E4%BA%8E90%E6%97%B6%2C%E2%88%A0DBC%E4%B8%8E%E2%88%A0ABC%E7%9A%84%E5%85%B3%E7%B3%BB%3F)
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