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1答题简析在△ABC中,BC=2~(1/2),AC=1,以AB为边作等腰直角三角形ABD(B为直角顶点,C,D两点在直线AB的两侧).当∠C变化时,线段CD长的最大值为____.这是我校月考的一道题,它来源于南通三调题,是原试卷中的压轴填空题,难度较大.从各班得分的统计情况看,这道题的得分率也确实低,笔者所教物化班55名学生,只有4人得到正确答案,其他物化班
In the △ ABC, BC = 2 ~ (1/2), AC = 1, with AB as the edge of the isosceles right triangle ABD (B is the right angle vertices, C, D two points on both sides of the line AB ). When the change of ∠ C, the maximum length of the line segment CD ____. This is my school month test a question, which comes from Nantong three questions, is the original papers fill in the finale of the title, more difficult. Statistics of the class score, the problem score rate is indeed low, I teach the cultural class 55 students, only 4 people get the correct answer, other materialized classes