1, the shape of a math book is usually rectangular, and a cuboid consists of three rectangular faces. A math book has only two rectangular faces, namely the front cover and the back cover, so it does not conform to the definition of a cuboid.
2. The volume of math books is usually much smaller than that of ordinary cuboids. The length and width of a math book are usually between 20 cm and 30 cm, and the height is less than 10 cm. In contrast, the size of a cuboid is much larger. For example, ordinary cartons are cuboids, and their length, width and height are all over 30 cm.
3. The shape of a math book is usually a regular rectangle, while the shape of a cuboid can be irregular. The front cover and back cover of a math book are parallelograms, and their inner angles are right angles, so it is easy to divide them into two rectangles. However, if the shape of an object is irregular, it cannot be divided into multiple rectangles or squares, which does not conform to the definition of a cuboid.
Math books are usually made of paper, while cuboids can be made of metal, plastic, wood, etc. Because different materials have different physical properties, they can't be grouped together.
The use of mathematics books
1, basic knowledge: Math books usually contain basic knowledge and concepts of mathematics, such as the nature of graphics, algebra, geometry and so on. By reading math books, students can master these basic knowledge and lay a solid foundation for further study.
2. Improve the calculation ability: Math books usually contain a large number of examples and exercises. By practicing these questions repeatedly, students' calculation ability and problem-solving ability can be improved. In addition, math books also contain some skills and methods that can help students solve problems faster.
3. Cultivate thinking ability: Mathematics is a subject that needs thinking and reasoning. By reading math books, students can cultivate their logical thinking and analytical ability. Problems in math books often require students to use a variety of methods and ideas to solve, which is helpful to cultivate students' innovative thinking and problem-solving ability.
4. Preparing for the exam: For students, math books are also important materials for preparing for the exam. By reading math books, students can understand the scope and requirements of the exam, grasp the key points and difficulties of the exam, and improve the exam results.
5. Broaden knowledge: Mathematics is a subject widely used in various fields. By reading mathematics books, students can understand the application and development of mathematics in different fields and broaden their knowledge.