2017年11月4日SAT官方每日一题---数学选择.

　　为了让我们更好的适应sat考试，sat官网每天都会有sat官方每日一题，下面是小编为您整理的2015年11月sat官方每日一题，是数学选择，让我们一起来看一看这道数学选择吧。

　　Read the following SAT test question and then click on a button to select your answer.

　　In the figure above, x = 60 and y = 40. If the dashed lines bisect the angles with measures of x degrees and y degrees, what is the value of z?

　　(A) 25

　　(B) 35

　　(C) 40

　　(D) 45

　　(E) 50

　　答案：E

　　解析：

　　First, add the labeled points A, B, C, D, E, and O to the figure, as shown above. Then segment line O B bisects angle A O C, so measure of angle A O B = measure of angle B O C, and measure of angle A O B + measure of angle B O C = x degrees = 60 degrees. Thus, measure of angle A O B = measure of angle B O C = 30 degrees. Similarly, measure of angle C O D = measure of angle D O E = 20 degrees, because angle C O D and angle D O E are of equal measure and the sum of their measures is y degrees = 40 degrees. From the figure, it follows that z degrees = measure of angle B O C + measure of angle C O D = 30 degrees + 30 degrees = 50 degrees. Therore, z = 50.

　　上面是小编为您整理的2015年11月sat官方每日一题，是数学选择，为了让我们更好的适应sat考试，sat官网每天都会有sat官方每日一题，让我们一起来看一看这道数学选择吧。