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: 9 Q( q4 C! L! e8 |" |4 o/ ` area of the particular region inside the figure/area of the whole figure. A* y% u/ s8 ]$ Y- q Example:: v( w2 d* Y9 j$ P Y8 b
The probability that a randomly selected point within the square lies inside the circle=area of circle/area of square=∏r2/(4r2)= ∏/4/ h) h- C1 |; y: R
Remember: 8 }! G* q& g5 g. U7 c* H If the particular region is not completely inside the figure, then use only the area that is inside the figure.
发表于 2012-8-15 12:55:17
