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GWD 13-23

In the figure, points A, B, C, D, and E lie on a line.  A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle.  What is the area of the region inside the larger circle and outside the smaller circle?

(1)     AB = 3 and BC =2

(2)     CD =1 and DE = 4

                  

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

说的是两个有圆心的圆,不知道大家做过没有,我得出来的答案是D,给的答案是A,苦恼中

求NN解答,谢谢!

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同意D,C D+D E=大圆直径=10,(10-4)/2=3为小圆半径,(2)充分.

TOP

thanks !!!!!!!!!

TOP

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