如图,ad=bc,df=ca,∠c=∠d,ad交bc于点h,ae⊥bc于点e.点f在bc上 ((1)若an是△aec的角平分线,求证S△aen:S△acn=ae:ac(2)当∠b=∠1+∠12°时,求∠b的度数
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![如图,ad=bc,df=ca,∠c=∠d,ad交bc于点h,ae⊥bc于点e.点f在bc上 ((1)若an是△aec的角平分线,求证S△aen:S△acn=ae:ac(2)当∠b=∠1+∠12°时,求∠b的度数](/uploads/image/z/10916982-54-2.jpg?t=%E5%A6%82%E5%9B%BE%2Cad%3Dbc%2Cdf%3Dca%2C%E2%88%A0c%3D%E2%88%A0d%2Cad%E4%BA%A4bc%E4%BA%8E%E7%82%B9h%2Cae%E2%8A%A5bc%E4%BA%8E%E7%82%B9e.%E7%82%B9f%E5%9C%A8bc%E4%B8%8A+%EF%BC%88%EF%BC%881%EF%BC%89%E8%8B%A5an%E6%98%AF%E2%96%B3aec%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%2C%E6%B1%82%E8%AF%81S%E2%96%B3aen%EF%BC%9AS%E2%96%B3acn%3Dae%EF%BC%9Aac%EF%BC%882%EF%BC%89%E5%BD%93%E2%88%A0b%3D%E2%88%A01%2B%E2%88%A012%C2%B0%E6%97%B6%2C%E6%B1%82%E2%88%A0b%E7%9A%84%E5%BA%A6%E6%95%B0)
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