SAT考试数学高频题型单项练习题5

>>2019年SAT考试：SAT考试数学高频题型单项练习题5

>>SATVIP精品直通课程

5. In the figure above AD = 4, AB = 3 and CD = 9. What is the area of triangle AEC ?

A. 18

B. 13.5

C. 9

D. 4.5

E. 3

10.Correct Answer: D

Explanation:

If we take AE as the base of triangle AEC, then the height is CD.

The height of the triangle is therefore, 9 (given).

To find the base we need to see that triangles AEB and CDE are similar. The ratio AB: CD, is therefore equal to the ratio AE: ED. The given information shows that the ratio is 3:9, or 1:3. Now dividing AD (4) in this ratio gives us AE as 1.

The area of AEC = ½ base x height

=1/2 x 9 = 4.5

以上就是考试高频题型了，大家可要勤加练习哦，如果这一篇不够，在坦途网SAT考试频道还有很多相关内容和SAT考试技巧，小编相信我们整理的内容都会对大家有帮助，如果大家认为这个网站对你有帮助，也可以分享给其他小伙伴哦！小编也会不断的更新更多的内容给大家，希望能帮助大家能考出自己理想的成绩！