初中数学复习指导

• 作 者: 张秋香
• 机 构: 河南省平顶山市第十四中学,
• 出 处: 中学生数理化(教与学)
• 发表日期: 2004年期
• 关键词: 题设 互补分析 截线 平行关系 证明过程 公共边 江苏泰州 三条

一、知识点扫描(一)概念1.命题:判断一件事情的句子叫做命题.每个命题都是由条件和结论两部分组成,条件是已知的事项,结论是由已知事项推断出的事项.一般地命题都可以写成“如果……那么……”的形式,其中“如果”引出的部分是条件,“那么”引出的部分是结论.正确的命题称为真命题,不正确的命题称为假命题.

First, the knowledge of point scanning (A) Concept 1. Proposition: sentence to determine one thing is called the proposition. Each proposition is composed of conditions and conclusions of two parts, the conditions are known matters, the conclusion is inferred from known issues In general, propositions can be written in the form of “if ... then ...”, where “if” leads to a condition, and “then” leads to the conclusion that the correct proposition is called True proposition, the incorrect proposition is called false proposition.