一道gmat数学题In the figureabove, a square&nb
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一道gmat数学题
In the figure
above, a square is inscribed in a circle.
If the area of the square region is 16, what is the area of the circular
region?
(A) 2π
(B) 4π
(C) 6π
(D) 12π
(E) 16π
怎么也算不出来是C
In the figure
above, a square is inscribed in a circle.
If the area of the square region is 16, what is the area of the circular
region?
(A) 2π
(B) 4π
(C) 6π
(D) 12π
(E) 16π
怎么也算不出来是C
正方形面积是16
说明正方形边长是4(这样4²=16)
那么对角线的长度是4√2
圆的半径是对角线长度的一半r=2√2
S=πr²=8π
估计是印刷错误吧,排版的人把8看成6了,答案应该是8π的.
如仍有疑惑,欢迎追问.祝:
说明正方形边长是4(这样4²=16)
那么对角线的长度是4√2
圆的半径是对角线长度的一半r=2√2
S=πr²=8π
估计是印刷错误吧,排版的人把8看成6了,答案应该是8π的.
如仍有疑惑,欢迎追问.祝:
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