题目已知等腰△ABC中,AB=AC,P、Q分别为AC、AB上的点,且AP=PQ= QB=BC,则么PCQ=___此题是2007年北京市中学生数学竞赛初二年级试题填空题的第3小题,该题难易适中,富有思考性,细致探究可发现此题解法灵活多变,思路宽广,不失为考查学生思维能力 When the subject is known to be isosceles △ABC, AB=AC, P, and Q are points on AC and AB, respectively, and AP=PQ=QB=BC, then PCQ=___ is the subject of the 2007 Beijing Middle School Mathematics Contest The third question of the first and second grade questions fills in the blank, the difficulty is moderate, and the thinking is rich. It can be found that the solution to the problem is flexible and broad, and it can be considered as a student’s thinking ability.