几个Tricky GWD数学讨论，怀疑答案不对

刚做GWD13套，数学竟然错了7个！！！14号就考了，怎么办？？？

有3个题怀疑答案有误，大家讨论^_^

Q13:

Is the measure of one of the interior angles of quadrilateral ABCD equal to 60 degrees?

(1)     Two of the interior angles of ABCD are right angles.

(2)     The degree measure of angle ABC is twice the degree measure of angle BCD.

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.

这题答案是C，可我认为是E。明显另两个角可以为60度和120度，也可以是45度和135度

                 A                                        E

val>

val>

val>

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

这题图贴不上来，其实就是一个大圆里面套个内切小圆啦，大家可以自己画^_^

我觉得是D，由2可知，AB+BC=5, AB-BC=1, 解出小圆半径AB为3，而大圆半径为5。可答案是A！！！????

谢谢^_^

E,A B

E, D ,A.