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(2003•安徽)如图所示,一种花边是由如图弧ACB组成的,弧ACB所在圆的半径...
(2003•安徽)如图所示,一种花边是由如图弧ACB组成的,弧ACB所在圆的半径为5,弦AB=8,则弧形的高CD为( )
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A.2
B.
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C.3
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021232403698493427/SYS201310212324036984934025_ST/1.png)
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