单项选择题


In the figure above，what is the length of AB（）
 

A.A
B.B
C.C
D.D
E.E

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单项选择题
In the figure above，O and P are the centers of two circles．If each circle has radius r，what is the area of the shaded region（）

A.A
B.B
C.C
D.D
E.E
单项选择题
The rectangular rug shown in the figure above has a floral border 1 foot wide on all sides．What is the area，in square feet，of that portion of the rug that excludes the border（）

A. 28
B. 40
C. 45
D. 48
E. 53
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