The first two questions are simple and difficult to infer or measure. If you are in doubt about conjecture and judgment, draw a conclusion first. And try to prove them. Tell me some skills: 1 draw quickly to ensure the correct rate. 2. Get used to drawing and discuss in categories. If you really can't find a certain condition, consider it known and deduct you at most. 4. Answer if you can't answer, and don't delete it if you don't have time to modify it. There are usually some. In case the examiner misses it (I have suffered this loss), let's talk about thinking again: geometry: it is generally rotation, and the thinking method is the same after several questions (often even the letters of the corners are the same ...), and try to prove it with the thinking of the first question. Function (combined with geometry): this is not normal, and the general situation is as follows: the first question: find the mark of the point: this question is very simple, but don't make mistakes ... there is no other way, there is always one of the three basic formulas. The third question: comprehensive answer: super disgusting, but there is no way. This kind of problems are all related to points. Find out all the analytical formulas of the points used, then gather them (for example, P is on y=3x+ 1, and let the coordinates of P be a, 3a+ 1), and finally list the ideas.