共50条信息
如图,已知点\(C\)在圆\(O\)直径\(BE\)的延长线上,\(CA\)切圆\(O\)于点\(A\),\(CD\)是\(∠\)\(ACB\)的平分线,交\(AE\)于点\(F\),交\(AB\)于点D.
\((1)\)求证:\(CE\)\(·\)\(AB\)\(=\)\(AE\)\(·\)\(AC\);
\((2)\)若\(AD\):\(DB\)\(=1\):\(2\),求证:\(CF\)\(=\)\(DF\).
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