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几何中最值问题的依据是:“两点之间,线段最短”、“垂线段最短”.在解决最值问题时,通常利用轴对称、平移等变换作出最值位置,从而把已知问题转化为容易解决的问题.本文在课本(人教版八上数学课题学习最短路径问题)中“饮马问题”、“造桥选址问题”的基础上进行变式探究,与同行交流.几何模型一、基本图形1.条件:如图1,点A、B是直线l异侧的两定点.
The most important problem in geometry is based on the following: “In the two points, the shortest line segment ”, “the shortest vertical segment ” In the solution to the most value problem, usually using axial symmetry, translation and other transformations to make the most value position The known problems into easy-to-solve problems.This article in the textbook (PEP eight math topics learning shortest path problem) “Yin Ma problems ”, “bridge site selection problem ” based on the change Type of exploration, exchange with peers Geometric model A, the basic graphics 1. Conditions: As shown in Figure 1, point A, B is a straight line l two fixed point.