Learned. Nowadays, primary school textbooks are all comprehensive, and there is no single geometry and algebra. Geometry comes from life, so it plays an important role in many negative aspects of life, such as area, volume and translation.

Plane (ruler): square, rectangle (rectangle), triangle, circle, line segment, straight line, ellipse and angle. Stereo (regular): cube, cuboid, cylinder, prism, frustum, frustum, cone, pyramid, sphere (less common). The earliest geometry belongs to plane geometry. Plane geometry is to study the geometric structure and measurement properties (area, length, angle) of straight lines and quadratic curves (that is, conic curves, that is, ellipses, hyperbolas and parabolas) on the plane. Plane geometry adopts axiomatic method, which is of great significance in the history of mathematical thought. The content of plane geometry naturally transferred to solid geometry of three-dimensional space. In order to calculate the problem of volume and area, people have actually started to involve the original concept of calculus.

Application of geometric figures;

1. Geometry is widely used, and it is needed in design, painting creation and mathematical research.

2. Mathematical definitions, theorems, etc. It is very abstract in mathematical language, and theorems are difficult to remember, so it is an important link in teaching to help students remember and define theorems. If geometric figures and numbers are properly combined in teaching, students can deepen their understanding of intuitive figures and master their theorems.