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In the figure above, the area of the shaded region is
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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
题目信息1m59s
平均耗时
92.3%
平均正确率
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