The geometric framework of the original experimental draft of the curriculum standard is divided according to four main lines: graphic cognition, graphic transformation, graphic coordinates and graphic proof. The revised version of the new curriculum standard changes four main lines into three main lines, namely, graphic nature, graphic change and graphic coordinates. Four main lines become three main lines, the first is the nature of graphics. This main line basically covers the understanding of the original graphics and the content of graphics and proof. In addition to understanding some basic graphics, it also includes the proof of some propositions of graphics, which also develops students' spatial concept and reasoning ability. The second main line is the change of graphics, which is rich in content, including contraction transformation-symmetry, translation, rotation and similarity (including similarity) of graphics. Because of the close relationship with similarity, the angular relationship of right triangle is also included, and the other transformation is affine transformation, which is presented in the form of projection in the standard. This part mainly studies the relationship between graphics, especially from the perspective of movement and change. This method is also very important in itself. The third main line is called graphics and coordinates, including the position and movement of coordinates and graphics, and describes the well-known symmetry, translation and similarity of graphics in coordinate transformation. There is a main line in the framework called graphics and change, which was originally called the transformation or movement of graphics and graphics, but the new curriculum changed to change. This is because in this part, there are not only mathematical transformations, but also some projections and views. In addition, the solution of right triangle is also included, so this part is called transformation, which is not so pure, and it is called movement. It is a bit far-fetched to solve the content of right triangle. Using the word change may better avoid those problems just now.

From the specific content changes, our front-line teachers have seen the changes in graphics and geometry. First of all, you will find the contents with asterisks, such as the deductive proof of similar triangles's judgment, the vertical diameter theorem in a circle, the tangent length theorem and so on. As part of the examination selection, it embodies the concept of "different people get different development in mathematics" in the curriculum standard, which is equivalent to providing students with a flexible space. For those students who have spare capacity and interest, give them more opportunities to learn more mathematics. Students can learn selectively and teachers can teach selectively.