Concepts in junior high school mathematics are the basic reference for solving junior high school mathematics problems, such as the shortest straight line distance, similar triangles's judgment rule, and the basic method of factorization.

These concepts must be mastered, and more importantly, they should be used flexibly, so the concepts of junior high school mathematics should be firmly grasped and memorized. Therefore, the concept of junior high school mathematics should be memorized, the meaning of the concept should be understood on the basis of memorization, and then the problem should be solved flexibly. Only in this way can we learn better.