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已知:如图,一个圆的两条弦AB和CE相交于点D,BE=2,BC=2BD=2,∠1...
已知:如图,一个圆的两条弦AB和CE相交于点D,BE=2,BC=2BD=2
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,∠1=∠2则EC=
,∠CBE=
.
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考点分析:
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如图,从圆O外一点A引圆的切线AD和割线ABC,已知AD=2
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