1. Teaching content analysis This lesson is the second type of simple geometry after learning the two special polyhedrons of prism and pyramid. The students of cylinder and cone have come into contact, but they only understand it in the sense of life. The textbook is here It is to give a mathematical definition. The inheritance of the content of cylinders and cones is that they are composed of quadrilaterals or triangles with prisms and pyramids. The difference is that they are formed in different ways. Here, an important development in students' cognition is the concept of curved surfaces. And the mathematical understanding of its formation. And this development happened to play a role in the formation of the concept of the ball and the concept of all rotating bodies. It is the most recent development area for students to follow the order.
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