Prep-PS-93

Janet_Ge

93.    10285-!-item-!-187;#058&007154

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
上题不会插图，就是圆里面有个内切正方形，答案是C
这题我的思路是：正方形面积是16,边长是4，那对角线是直径算出来是4倍根号2，半径是2倍根号2，那圆的面积是8π，可竟然没有这个答案