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(一)直线、相交线和平行线一、二十二个应掌握的知识点线段、射线、直线的联系与区别;角的定义;角的度量;角的分类;互为余角;互为补角;对顶角;两边分别平行(垂直)的两角关系;角平分线的性质;垂线的定义;垂线的性质与判定;两点间的距离;点到直线的距离;两条平行线之间的距离;中垂线的性质;平行线的性质及判定;命题;真(假)命题;定义;公理;定理。二、五个防患点 1。区别生活语言与几何术语“直线AB上一点C”不是“在直线AB的上方一点C”。 2.叙述“两点间的距离”的定义时,“长度”两字不能漏掉。 3。角的单位换算,“六十进制”与“十
(a) Straight lines, intersecting lines and parallel lines One or two dozen knowledge points, rays, and lines should be mastered; the definition of angles; the measurement of angles; the classification of angles; each being a complementary angle; Complementary angle; angle to the apex; two angled (vertical) two-corner relations on two sides; the nature of the angle bisecting line; the definition of a vertical line; the nature and determination of the vertical line; the distance between two points; the distance from the point to the straight line; The distance between parallel lines; the nature of vertical lines; the nature and determination of parallel lines; propositions; true (false) propositions; definitions; axioms; theorems. Second, five prevention points 1. The difference between the language of life and the geometric term “a point C on the line AB” is not “a point C above the line AB”. 2. When describing the definition of “distance between two points,” the word “length” cannot be omitted. 3. Conversion of corner units, “sixteen decimal” and "ten