目标点击1.理解命题、定义、公理、定理的含义,会区分命题的题设和结论;2.会用三角形全等的判定方法判定三角形全等;3.掌握五种基本图形的作图方法,会用几何语言描述作图步骤;4.掌握命题、互逆命题、定理、互逆定理的联系与区别; Goal 1. Click to understand the meanings of propositions, definitions, axioms, and theorems, and distinguish between the propositional design and the conclusions of the proposition; 2. Triangular contingency is determined by trigonometric contingency methods; 3. Grasp the five basic graphs. , will use geometric language to describe the mapping steps; 4. Master the propositions, reciprocal propositions, theorems, reciprocity theorem of the contact and difference;