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2014年重庆中考数学第18题是填空题中的压轴题,思维含量高且不易计算,有一定的难度.此题将正方形、勾股定理、全等三角形、相似三角形等融于一起,考察知识点多,综合性强.笔者为此经历了旋转、化归、坐标法进行了一题多解,以发散同学们的思维,开阔视野.题目:(2014年重庆)如图1,正方形ABCD的边长为6,点O是对角线AC、BD的交点,点E在CD上,且DE=2CE,过点C作
2014 Chongqing exam math eighteenth question is the finale of fill in the blank question, high thinking and difficult to calculate, there is a certain degree of difficulty.This question will square, Pythagorean theorem, congruent triangle, similar to the triangle together, examine the knowledge Point, comprehensive and strong.The author experienced a rotation, return, coordinate method for a multi-solution, in order to diverge the students’ thinking, broaden their horizons Title: (2014 Chongqing) Figure 1, the square ABCD Side length of 6, the point O is the intersection of the diagonal AC, BD, point E on the CD, and DE = 2CE, too C for