共50条信息
如图,\(PC\)与圆\(O\)相切于点\(C\),直线\(PO\)交圆\(O\)于\(A\),\(B\)两点,弦\(CD\)垂直\(AB\)于\(E.\)则下面结论中正确的有( )个
\(①ABEC\)∽\(\triangle DEA②∠ACE=∠ACP\)
\(③DE^{2}=OE·EP④PC^{2}=PA·AB\)
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