几何概型有两个特点:一是无限性,即在一次试验中,基本事件的个数是无限的;二是等可能性,即每一个基本事件发生的可能性是均等的.几何概型问题求解概率的公式P(A)=d的测度D的测度(分母不为0),其中“测度”的意义依几何区域D确定,当D分别是线段、平面图形和立体图形时,相应的“测 The geometric pattern has two characteristics: First, it is infinite, that is, in a test, the number of basic events is infinite; second is the possibility that the probability of each basic event is equal. The probability of problem solving formula P (A) = d measure the measure of D (denominator is not 0), where the meaning of “measure” is determined by the geometric region D, when D is the line segment, the plane graph and the stereo graph, the corresponding "Measurement