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阴影部分面积计算问题能考查学生的思维和综合运用数学知识的能力.学生对此类问题往往展不开思路,找不准图形之间的关系,缺乏有效的对策和手段.本文根据近年来各地中考中出现的试题,介绍几种常用的解法,供读者复习时参考.一、等积变形法利用“等底、等高的两个三角形面积相等”
The problem of calculating the area of shadows can examine students’ thinking and the ability to use mathematical knowledge synthetically. Students often cannot develop ideas on such issues, cannot find relationships between graphs, and lack effective countermeasures and means. This article is based on recent years The examination questions appearing in the middle school entrance examination introduce several commonly used solutions for readers to review when referencing. First, the equal-volume deformation method uses “equal, equal height of two triangles in the same area.”