新SAT官方Daily Practise每日一题数学函数题

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

answer.

7月SAT数学官方Daily Practice 每日一练，点击练习

In triangle ABC, the sum of the measures of angle A and angle B is 70 degrees.

The measure of angle A is one-half the measure of angle B. If the measure of

angle B is equal to x degrees, which of the following expressions represents the

sum of angles A,B and C?

A.x+2x+110

B.x/2+x+110

C.1/2(x+2x+110)

D.x/2+x+70

重点单词:

comma ['kɔmə] n. 逗号，停顿，间歇 n. 银纹多角蛱蝶

measure ['meʒə] n. 措施，办法，量度，尺寸 v. 测量，量

multiple ['mʌltipl] adj. 许多，多种多样 n. 倍数，并联

triangle ['traiæŋgl] n. 三角(形)

答案：B

解析：

Choice B is correct. The sum of the three interior angles in a triangle is

180 degrees. If the measures of two interior angles in the triangle sum to 70

degrees, then the third angle must measure 110 degrees. If the measure of angle

B is x and the measure of angle A is one-half of the measure of angle B comma

then the measure of angle A is x/2. Therefore, x/2+x+110 is the sum of the

measures of the angles in triangle ABC.