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1.提出问题:本人从事初中数学教学工作多年,一直十分重视教材中“实验与探究”类问题的教学与研究,本文就新人教版八年级数学第十九章《平行四边形》“实验与探究”问题的教学为主线,以等积变换为突破口,体现教材的应用价值。如图1,正方形ABCD对角线相交于点O,点O又是正方形A1B1C1O的一个顶点,而且这两个正方形的边长
1. Questions: I am engaged in junior high school mathematics teaching for many years, has always attached great importance to textbooks in the “experimental and inquiry” class of teaching and research, this article on the new teaching eighth grade mathematics Chapter XIX “parallelogram” The teaching of “Experiment and Inquiry” is the main line, with equal product transformation as the breakthrough point, which embodies the application value of teaching materials. As shown in Figure 1, the diagonal of the square ABCD intersects at point O, which is again a vertex of the square A1B1C1O, and the lengths of the two squares