新SAT官方Daily Practice每日一题数学推理题

小站教育2017-08-15 14:24:28

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摘要:本系列将给大家带来SAT官方的每日一练数学真题,各题型都有,持续更新,希望大家同步多练习。今天这里分享的是8月14日的数学推理题,一起来练习吧!

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

8月SAT数学官方Daily Practice 每日一练,点击

Sarah has a rectangular swimming pool that measures 12 feet(ft) by 72ft across the surface. To the nearest foot, what is the diagonal distance across the surface of the pool?

A.60ft

B.71ft

C.73ft

D.84ft

重点单词:

calculate ['kælkjuleit]v. 计算,估计,核算,计划,认为

diagonal [dai'ægənl]adj. 对角线的,斜的,斜纹的 n. 对角线,斜线,斜

negative ['negətiv]adj. 否定的,负的,消极的n. 底片,负

context ['kɔntekst]n. 上下文,环境,背景

rectangular [rek'tæŋgjulə]n. 矩形

multiple ['mʌltipl]adj. 许多,多种多样的

答案:C

解析:

Choice C is correct. The Pythagorean theorem can beused to calculate the diagonal length of theswimming pool surface where a and b are the sidelengths of the pool surface.

c²=a²+b²=12²+72²=5328, c≈±73

A negative distance is not possible in this context, so the diagonal distance across the swimming pool surface is about 73ft.

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