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In the figure above, the area of the shaded region is
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
反思:pace慢,算得比较慢,用大三角形的面积-小三角形的面积的方法,实际上大三角形的面积直接可以看成是半个正方形的面积
所在三角形的高,用三角函数sin60°=h/4根号2,可以求出来,然后就可以求出来三角形的面积8倍根号3
半个正方形的面积=4*4*(1/2)=8
阴影部分面积=所在三角形的面积-半个正方形的面积=8倍根号3-8=8(根号3-1)
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问题求解PS
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GMAT难题300合集
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平均耗时
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平均正确率
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