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如右图,已知圆的半径是5,弦AB的长是6,则弦AB的弦心距是( ) A.3 B....
如右图,已知圆的半径是5,弦AB的长是6,则弦AB的弦心距是( )
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A.3
B.4
C.5
D.8
考点分析:
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