gwd30-9

digimagics

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.

Why not E?

90-90-120-60

90-90-45-135

                                                                                                 

[此贴子已经被作者于2007-1-19 12:42:28编辑过]

mymengming

（1）＋（2）

四个角为45，90，90，135

ciduo777

以下是引用digimagics在2007-1-18 16:32:00的发言：

Why not E?

90-90-120-60

90-90-45-135

                                                                                                 

同问~~~(1)+(2)并不能确定啊~~

kaijen

這題在破解版ps2第214題

答案是E喔

從1推論並沒有說90度的角一定是排除在2情形的兩個角
所以假設ABC這個角為90, 另一個角BCD為45
然後BAD也是90(符合條件1有兩個90度的角),但是最後一個角會是135度
還是沒有60度的角

notidgen

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