You are a junior high school student. Generally, girls' logical thinking is worse than boys'. Plane geometry is a recognized learning difficulty in junior high school, and the requirements for students' abstract logical thinking are obviously higher than those of other subjects, so many girls have a hard time learning. In the compulsory education stage, arithmetic, algebra, physics and chemistry do not involve much logical thinking, but mainly focus on assessing memory knowledge, so it is easier for girls to learn these subjects well. Drawing auxiliary lines is the key to learn plane geometry well. First of all, we should firmly grasp the theorem in the textbook, then we should be familiar with some basic patterns and understand the adding methods of auxiliary lines of various basic patterns.