证明是由题设(已知)出发,经过一步步推理,最后推出结论(求证)正确的过程。同学们初学几何证明时,不容易把证明过程写完整,现就证明中应注意的问题举例说明。1、要注意证明中的每一步推理都要有根据,这些根据可以是已知条件,也可以是定义、公理或定理,并把根据写在每一步推理后 Proof is based on the title (known), after step-by-step reasoning, and finally the conclusion of the conclusion (proven) the correct process. When the students begin to learn the geometric proof, it is not easy to write the proof process completely. Now we will give an example of the problems that should be noticed in the proof. 1. It should be noted that each step of the proof in the proof must be based on the known conditions, the definitions, the axioms or theorems, and the basis for the reasoning after each step