Forbest Academy

免费资源 > SAT-数学 > SAT数学:角度例题 2

SAT数学:角度例题 2

2019-09-12 SAT-数学 阅读

SAT Question
Rank: Medium
Topic: Algebra, Angles

Below is a question from a recent SAT exam. It is a non-calculator question that would typically take a student 1-2 minutes to complete.

In the figure above, point B lies on AD. What is the value of 3x?
(A) 18
(B) 36
(C) 54
(D) 72

To answer this question, we must realise that ABD is a right angle; therefore, CBD is also a right angle. All right angles are 90°.

AsCBD is made up of the three angles if we add them together they must make 90.

First, we simplify the left-hand side.

Now, we can solve this equation

The question asks us for the value of 3x. So we must multiply the value of x by 3


So, the answer is 54.

福拜思教育

加拿大校区
  • 地址:401-5811 Cooney Rd, Richmond, BC
  • 地址:3030-8171 Ackroyd Rd, Richmond, BC
  • 客服热线:604-370-0579 & 604-370-2569
  • 联系邮箱:service@forbest.com
中国校区
  • 地址:江苏省无锡市梁溪区清扬路268号三楼
  • 客服热线:181-1861-8855
关注我们
  • 官方公众号
  • 加拿大官方客服
  • 中国官方客服

Copyright 2021 Forbest Academy  福拜思教育

电话咨询 置顶 English
关注我们