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已知三棱锥P-ABC中各侧面与底面所成的二面角都是60°,且三角形ABC三边长分...
已知三棱锥P-ABC中各侧面与底面所成的二面角都是60°,且三角形ABC三边长分别为7、8、9,则此三棱锥的侧面积为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842175768/SYS201310241834418421757007_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842175768/SYS201310241834418421757007_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842175768/SYS201310241834418421757007_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024183441842175768/SYS201310241834418421757007_ST/3.png)
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