初二数学教学设计等腰三角形(国外英语资料).docVIP

初二数学教学设计等腰三角形(国外英语资料) Brave, courage and will to duel five papers out; a coward, almost to the Shumu inch light will lose the life! Mathematics teaching design in junior high school An isosceles triangle Nankang Daping middle school Wang Jianqing Lesson type: new instruction Date: 4.12 Textbook analysis: 1. This section is the key part of the nine chapter of axial symmetry in Grade Seven Its the first lesson of an isosceles triangle Since primary school already has the basic concept of isosceles triangle Therefore, the lesson should be based on an intuitive understanding of the isosceles triangle from an axisymmetric point of view The two theorems of isosceles triangle and their applications are emphatically discussed How to understand isosceles triangle from the angle of symmetry is a completely different starting point between the new textbooks and the old ones Should be re understanding The first lesson in getting started 2, isosceles triangle is in the eighth chapter polygon in the triangular knowledge on the basis of further depth How to utilize the ideas and views that have been formed in the process of learning triangles It is also important for understanding the special consequences of the isosceles condition 3 isosceles triangle is one of the basic geometric figures It plays an important role in geometry learning in the future Is the basic unit of complex graphics The theorem of isosceles triangle provides a powerful tool for the solution of geometric problems in the future 4, symmetry is an important thought of geometry, observation and thinking It is also one of the common starting points for solving practical problems in life Learning this section of knowledge is of great importance to the understanding of symmetry 5. Geometric operations in examples The initial experience of the idea of combining numbers and shapes How to combine algebraic Equivalent Thinking in geometry is a key problem in Teaching 6, the plausible reasoning of the new textbook is an i