摘要:解:连AC,BD交于O点,连GO,FO,EO.
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(2012•辽宁)选修4-1:几何证明选讲
如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C,D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
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如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C,D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
(2012•辽宁)选修4-1:几何证明选讲
如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C、D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
查看习题详情和答案>>
如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C、D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
选修4-1:几何证明选讲
如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C,D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
查看习题详情和答案>>
如图,⊙O和⊙O′相交于A,B两点,过A作两圆的切线分别交两圆于C,D两点,连接DB并延长交⊙O于点E.证明:
(Ⅰ)AC•BD=AD•AB;
(Ⅱ)AC=AE.
查看习题详情和答案>>