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如图2-1-5,DE分别为⊙O中与的中点,连结DE分别交弦AB.AC于M.N,求证:AM·
如图2-1-5,DE分别为⊙O中与的中点,连结DE分别交弦AB.AC于M.N,求证:AM·
发布时间:2021-02-20 12:12:12
如图
2-1-5
,DE分别为⊙O中与的中点,连结DE分别交弦AB、AC于M、N,求证:AM·AN=DM·EN.
图
2-1-5
网友回答
答案:
思路分析:欲证AM·AN=DM·EN,只需证.
证明:连结AD、AE,
△ADM∽△EAN
AM·AN=DM·EN.
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