初二下数学题(三角形的判定)1、在△ABC中,∠ACB=90°,AC=BC,D为AC上一点,E为BC延长线上一点,使AE=BD,若∠E=70°,试求∠BDC的大小 2、AD,A'D'分别是锐角三角形ABC和锐角三角形A'B'C'中BC、B'C'边上的高
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![初二下数学题(三角形的判定)1、在△ABC中,∠ACB=90°,AC=BC,D为AC上一点,E为BC延长线上一点,使AE=BD,若∠E=70°,试求∠BDC的大小 2、AD,A'D'分别是锐角三角形ABC和锐角三角形A'B'C'中BC、B'C'边上的高](/uploads/image/z/6116112-0-2.jpg?t=%E5%88%9D%E4%BA%8C%E4%B8%8B%E6%95%B0%E5%AD%A6%E9%A2%98%EF%BC%88%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E5%88%A4%E5%AE%9A%EF%BC%891%E3%80%81%E5%9C%A8%E2%96%B3ABC%E4%B8%AD%2C%E2%88%A0ACB%3D90%C2%B0%2CAC%3DBC%2CD%E4%B8%BAAC%E4%B8%8A%E4%B8%80%E7%82%B9%2CE%E4%B8%BABC%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E4%B8%80%E7%82%B9%2C%E4%BD%BFAE%3DBD%2C%E8%8B%A5%E2%88%A0E%3D70%C2%B0%2C%E8%AF%95%E6%B1%82%E2%88%A0BDC%E7%9A%84%E5%A4%A7%E5%B0%8F+2%E3%80%81AD%2CA%27D%27%E5%88%86%E5%88%AB%E6%98%AF%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E5%92%8C%E9%94%90%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2A%27B%27C%27%E4%B8%ADBC%E3%80%81B%27C%27%E8%BE%B9%E4%B8%8A%E7%9A%84%E9%AB%98)
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