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大华雅思
大华雅思
SAT1官网每日一题之数学篇(十一)
sat考试官方网站每日一题小结,以下是SAT1数学部分。
Read the following SAT test question, then click on a button to select your answer.
 
   What is the area of the triangle in the figure above?
   A.4.0
   B.7.5
   C.8.0
   D.8.5
   E.15.0
  
Correct Answer: B
  
Here's Why:
   Figures in a Coordinate Plane
   The figure provides all the information you need to answer the question.
   What Is the Question Asking?
   You are asked to figure out the area of a triangle that is defined by the points in a coordinate plane.
   What Do You Know?
   The triangle in the figure is a right triangle with the right angle at the lower left.
   Because it is a right triangle, its base and height are the two sides that form the right angle.
   The area of a triangle is
  bh.
   The base of the triangle extends from point (0, 0) to point (5, 0). So it is 5 units long.
   The height of the triangle extends from point (0, 0) to point (0, 3). So it is 3 units long.
   Area =
  bh
   =
  (3)(5)
   =
(15)
   = 7.5
   Difficulty: Medium
   Question Type: Standard Multiple Choice
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