2. Mark the known corners and edges with concise symbols in the diagram.

3. Focus on the median vertical line, and the "three lines in one" of the triangle (i.e. angle bisector, vertical line and middle line).

4. In some cases (the goal of proof is clear), it can be inferred according to the object to be proved.

Note: 1, carefully examine the questions, and then carefully examine the questions.

Many questioners use these things to hurt our kind candidates. ) the known conditions added in the first question must not be used in the second question for the sake of temporary convenience.

3, (This is the most important thing, if you want to do well in the exam, this is the foundation) The foundation should be practical, the class should be serious, and fame and fortune should be indifferent-the key to learning science well.

4. When correcting conditions, calculating and answering questions on draft paper, don't be too quick, otherwise you or the teacher who corrects the paper can't see clearly.

This is the way I answer questions. I hope you can adopt it.