选择题
2014 AMC 8 Problem 20: Rectangle Outside Circles
Rectangle ABCD has sides CD=3 and DA=5. A circle of radius 1 is centered at A, a circle of radius 2 is centered at B, and a circle of radius 3 is centered at C. Which of the following is closest to the area of the region inside the rectangle but outside all three circles?
2014 AMC 8 第20题 ：矩形外圆
矩形aBCD的边CD = 3 ， DA = 5。半径为1的圆以A为中心，半径为2的圆以B为中心，半径为3的圆以C为中心。以下哪一项最接近矩形内但在所有三个圆之外的区域？
A.
3.5
B.
4.0
C.
4.5
D.
5.0
E.
5.5