1. Three-dimensional graphics: refers to the graphics in three-dimensional space, including cylinders, cones, rotating bodies, etc. Cylinders can be divided into cylinders and prisms, cones can be divided into cones and pyramids, and rotating bodies include spheres and spherical gaps. In addition, cross-section is also a common three-dimensional figure, including frustum, frustum, truncated cylinder, truncated prism and truncated cone.
2. Plane graphics: refers to graphics on a two-dimensional plane, including circles and polygons. Circles include perfect circles and ellipses, while polygons include triangles and quadrangles. In addition, there are some special plane figures, such as bows, arcs and sectors.
3. Geometric figures are figures that study basic concepts such as shape, size and measurement in mathematics. Geometric figures play an important role in mathematics and are the basis of learning geometry. Through geometric figures, we can deeply understand the essence and transformation of figures and further explore theorems and formulas in geometry.