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在数学的几何世界中,有时辅助线是我们解决问题的关键,但许多人不会利用辅助线,在一些梯形中,我们可以将梯形的两条边延长,构成三角形去解题;在一些复杂图形中,我们也可以做辅助线,使得复杂图形变为基本图形后再解答,这使得精通基本图形的同学可以轻而易举地找出这道题的题眼,顺势作答.下面的这些范例很好地诠释了辅助线的用处之大!(1)如图1,过D(1,0)作直线分别交AB,BC于E,F两点,设E,F两点的横坐标分别
In the mathematical world of geometry, sometimes the auxiliary line is the key to solve the problem, but many people will not use the auxiliary line. In some trapezoid, we can extend the two sides of the trapezoid to form a triangle to solve the problem; in some complicated Graphics, we can also do the auxiliary line, making the complex graphics into basic graphics and then answer, which makes proficient basic graphics students can easily find the title of the problem, homeopathic answers. The following examples are very good Interpretation of the usefulness of the auxiliary line! (1) As shown in Figure 1, over D (1,0) for the line to pay AB, BC in E, F two points, set E, F two points respectively