与原来的课标实验稿相比,2011年版的数学新课标,对平行四边形、矩形、菱形、正方形之间的关系,以及平行四边形、特殊的平行四边形的性质定理和判定定理,都有了较高层次的要求.在《四边形》一章中,平行四边形和各种特殊的平行四边形的概念之间重叠交错,容易混淆,一些同学往往搞不清它们的共性、特性及从属关系.有时虽 Compared with the original textbook experimental version, the 2011 edition of the new mathematics curriculum, the parallelogram, rectangle, diamond, the relationship between the square, as well as the parallelogram, special parallelogram of the nature of the theorem and judgment theorem, have Higher level requirements In the chapter “Quadrilaterals”, the concept of parallelograms and various special parallelograms overlap easily and confuse, and some students are often confused about their commonness, characteristics and subordination.