"Side expansion view of right prism and cone" PPT

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"Side expansion view of right prism and cone" PPT

Part One: Cooperative Learning

Please cut a cube carton along some edges so that the six faces are connected together to form a plane figure. What kind of plane figure can you get?

Cut the cube along some edges and lay it flat, and connect the six faces together. This figure is called the surface expansion of the cube.

Question: What is the positional relationship between the two opposite faces of a cube in the unfolded view of its surface?

Answer: One row or one column apart

Side expansion diagram of right prism and cone PPT, part 2 content: Structural characteristics of cones

Cone: The geometry formed by the straight line where one right-angled side of the right triangle is located is the axis of rotation, and the curved surface formed by the rotation of the other two sides is called a cone.

Side view of a cone

As shown in the figure, if the side of the cone is expanded along AB, what shape will be obtained? What is the relationship between the side expansion diagram of a cone and △OAB?

For example, Figure 32-3-5 shows a cube. Draw a surface expansion diagram of it according to the edges.

Solution: There are many ways to expand by edges, one of which is shown in Figure 32-3-6.

Side expansion diagram of right prism and cone PPT, the third part: practice

1. Can the following plane figures be folded into a cube?

2. As shown in the picture, there is a cube-shaped room with a side length of 4 meters. A spider is at A and a fly is at C.

⑴What is the shortest distance a spider needs to crawl to catch a fly?

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Download the PPT courseware of "Side Development of Right Prisms and Cones":

"Side Development of Right Prisms and Cones" PPT courseware download part one content: The development of geometry introduced into scenarios is widely used in production time. Through the development of geometry, three-dimensional models can be determined and produced, and the relative geometry of related geometry can also be calculated. side..

"Side expansion diagram of right prism and cone" PPT download:

"Side development diagrams of right prisms and cones" PPT download Part 1 content: Learning objectives: 1. Understand the side development diagrams of right prisms and cones, and further develop spatial concepts 2. Be able to use the knowledge of side development diagrams of right prisms and cylinders to solve problems Practical problems. observe ..

"Side development of right prism and cone" PPT courseware:

"Side Development of Right Prisms and Cones" PPT courseware Part One: Understanding of Right Prisms Observe the following three-dimensional figures. They are all right prism objects. Think about what characteristics their shapes have in common? 1. Understanding of right prism: It has the following characteristics..

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Update Time: 2024-11-19

This template belongs to Mathematics courseware Hebei Education Edition Ninth Grade Mathematics Volume 2 industry PPT template

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