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(2009•绵阳)如图,△ABC是直角边长为a的等腰直角三角形,直角边AB是半圆...
(2009•绵阳)如图,△ABC是直角边长为a的等腰直角三角形,直角边AB是半圆O
1的直径,半圆O
2过C点且与半圆O
1相切,则图中阴影部分的面积是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808677935750/SYS201310212308086779357006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808677935750/SYS201310212308086779357006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808677935750/SYS201310212308086779357006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808677935750/SYS201310212308086779357006_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131021230808677935750/SYS201310212308086779357006_ST/3.png)
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