I. Analysis:

Put a cuboid on the table for observation. When the line of sight is at a vertex of a cuboid, you can see the most faces. At this time, you can see three faces. This topic examines the observation of objects and geometric figures from different directions and exercises students' spatial imagination and abstract thinking ability.

Second, the introduction of cuboids:

Cuboid (also known as cuboid) is a regular quadrangular prism with rectangular bottom (or a regular parallelepiped with rectangular upper and lower bottom). It consists of six faces, the opposite faces are equal in area, and there may be two faces (four faces may be rectangular, or all six faces are rectangular) that are square.

Learning methods of mathematical geometry;

1, master the basic concepts of geometry:

To learn geometric mathematics, we must first master the basic concepts of geometry. The solution of geometric problems can not be separated from mastering the basic geometric concepts such as area, perimeter and size relationship. Therefore, it is necessary to explore various new concepts or nouns used in geometric mathematics, and clearly grasp the connotation of these concepts and nouns in mathematics.

2. Look at geometry:

Geometric mathematics is often expressed and calculated with more intuitive graphics. After mastering the knowledge of geometric figures, it is suggested to read more geometric figures, think through drawing, and then think about the steps to solve the problem.

3. Recite the basic formula:

Basic formulas are often used in solving geometric problems, so we should memorize all kinds of formulas, analyze and use them reasonably.

4. Practice more geometry questions:

Geometric mathematics is a subject that needs more practice and practice, and the knowledge in class needs to be mastered through many exercises. At the same time, you can buy some guidance books on geometric mathematics and practice common geometric figures such as squares, triangles and circles.

5, form a way of thinking:

When solving geometric mathematics problems, we usually combine arts and sciences, so we should exert our imagination and judgment, learn to summarize and think about solving methods, and lay a foundation for future knowledge application.