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一、考点概述 本章的命题热点可概括为如下三个方面。 1.基本概念和公式 主要有(1)有向线段的概念、分点坐标公式(含中点公式及三角形重心的坐标公式)两点间的距离公式。(2)直线的倾角和斜率的概念和公式。(3)直线的方程式(点斜式、斜截式、两点式、一般式及直线系方程)。(4)两条直线平行、垂直的条件,两直线间的夹角公式。(5)点到直线的距离公式,两平行线间的距离,两条直线的交点坐标。(6)中心对称和轴对称的概念及应用等。 2.基本方法 主要有(1)解析法及应用。(2)待定系数法及应用。(3)参数法及应用。(4)交轨法及应用。(5)对称法及应用。
First, the test center overview The proposition hot spots in this chapter can be summarized as the following three aspects. 1. Basic Concepts and Formulas There are mainly (1) the concept of a directed line segment and the formula for the distance between the two points of the point coordinate formula (including the midpoint formula and the coordinate formula of the center of gravity of the triangle). (2) The concept and formula of the inclination and slope of the straight line. (3) Linear equations (point oblique, oblique intercept, two-point, general, and linear equations). (4) The condition of parallel and vertical lines, the formula of the included angle between two lines. (5) The formula for the distance from the point to the straight line, the distance between the two parallel lines, and the coordinates of the intersection of the two straight lines. (6) The concept of center symmetry and axisymmetric and its applications. 2. Basic Methods There are mainly (1) analytical methods and applications. (2) undetermined coefficient method and application. (3) Parameter method and application. (4) Crossing method and application. (5) Symmetry and application.