SAT数学题解析：求三角形面积

【51Test.NET - SAT】
SAT数学考试对于中国高中的考生来说一般还是很有把握的，但是对于低年级的中国考生就需要更多的练习了。SAT数学考试题的解法的积累是尽量减少这种练习的有效途径，也是积累SAT数学词汇的好办法。下面就是一道SAT数学考试题及其解法，供大家参考。
　　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

答案和解析
　　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 isbh.
　　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
　　SAT数学考试题题型则分为选择题和填写空格题两种，考察范围包括算术及应用题、代数及函数、几何及度量衡、数据分析、统计学及基础概率论。大家在备考自己的SAT数学考试的时候，可以练习一下相关的解法。SAT