学生要想学习好,不但要刻苦努力,而且还要讲究方法。比如解题,不是为了学会解某一个题,而是要学会解某一类题,这样就会事半功倍。以解直角三角形为例:只要了解勾股定理以及初中阶段中常见的两类特殊的直角三角形,解直角三角形这一类题就比较好解了。两类特殊的三角形:一类是内角分别为30°,60°,90°的直角三角形,其三边的比分别为1:姨3:2,即斜边是短的直角边的2倍,长直角边是短直角边的姨3倍。因此,解这种三角形只要知道 Students want to learn well, not only hard work, but also pay attention to methods. Such as problem solving, not to learn to solve a particular question, but to learn to solve a certain type of question, so that you can do more with less. To solve the right triangle as an example: as long as you know the Pythagorean theorem and junior high school common two types of special right-angled triangle, right triangle solution of this type of problem is better. Two types of special triangles: one is a right-angled triangle with internal angles of 30 °, 60 °, and 90 °, respectively, with the ratio of the three sides being 1: 3: 2, The long right-angle side is a short right-angle edge aunt 3 times. So, just know this triangle