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近年来,一类矩形折纸问题“折”进了中考数学题,有的考生感到解答起来不够顺手,颇具难度。本文就这类题型的解题规律作些探讨与提示,请看例题。例1 (2006年甘肃兰州市)如图,在直角坐标系中,将矩形OABC沿OB对折,使点
In recent years, a type of rectangular origami problem has “folded” into the mathematics problem of senior high school entrance examination, and some candidates feel that it is not easy enough to answer it, making it difficult. This article makes some discussion and hints on the problem-solving laws of this type of question. Please see examples. Example 1 (Lanzhou City, Gansu, China) In the rectangular coordinate system, the rectangle OABC is folded along the OB to make the point