共50条信息
如图,已知圆\(O_{1}\)和圆\(O_{2}\)交于点\(C\)和\(D\),圆\(O_{1}\),上的点\(P\)处的切线交圆\(O_{2}\)于\(A\),\(B\)两点,交直线\(CD\)于\(E\),\(M\)是圆\(O_{2}\)上的一点,若\(PE=2\),\(EA=1\),\(∠AMB=30^{\circ}\),则圆\(O_{2}\)的半径为________.
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