Geometric Figures

　　If a point is selected at random inside a geometric figure, then the probability that the selected point lies inside a particular region is the ratio of their areas:

　　area of the particular region inside the figure/area of the whole figure.

　　Example:

　　The probability that a randomly selected point within the square lies inside the circle=area of circle/area of square=∏r2/(4r2)= ∏/4.

　　Remember:

　　If the particular region is not completely inside the figure, then use only the area that is inside the figure.

　　俗话说：“工欲善其事必先利其器”。有一部分考生认为新GRE数学具有一定的难度，这其中的原因是由于考生在复习时没有把新gre数学的基础打牢。想要新gre数学考好，复习的时候一定要把基本概念和重要考点都弄扎实。