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如图,若正方形A1B1C1D1内接于正方形ABCD的内接圆,则的值为( ) A....
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/images0.png)
如图,若正方形A
1B
1C
1D
1内接于正方形ABCD的内接圆,则
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/0.png)
的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102458338821909/SYS201311031024583388219002_ST/4.png)
考点分析:
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