| Category | Format | Size |
|---|---|---|
| Beijing Normal University seventh grade first volume mathematics | pptx | 6 MB |
"Cut a Geometry" Rich Graphic World PPT Courseware 2
Description
"Cut a Geometry" Rich Graphic World PPT Courseware 2
Section definition:
Use a plane to cut a geometry, and the cut surface is called a section.
Think about it: if we use a "knife" to cut a geometric body, what shape might the cut out surface be? Let's take a cube as an example.
From the previous knowledge, we know that "a line is obtained when a surface intersects a surface." If a plane is used to cut a geometric body, the resulting cross-section is the figure formed by the intersection of the plane and each face of the geometric body. The cube has only six faces, and the cross-section has at most six sides. That is, the hexagon has the most sides.
Take a guess:
1. Use a plane to cut a geometric object. If the shape of the cross section is a circle, can you imagine what the original geometric object might be?
2. Use a plane to cut a geometric body. If the shape of the section is a triangle, can you imagine what the original geometric body might be?
Summary
1. The definition of cross-section: Use a plane to cut a geometric body, and the cut-out surface is called a cross-section;
2. The cross-section of a cube can be a triangle, quadrilateral, pentagon, or hexagon.
3. Guess the original geometry through the cross-sectional shape.
Keywords: Rich graphical world courseware, Cutting a geometry courseware, Beijing Normal University edition seventh grade mathematics volume PPT courseware, Download seventh grade mathematics slide courseware, Download rich graphical world PPT courseware, Cutting a geometric body PPT courseware download, .ppt Format
For more information about the PPT courseware "Cut a Geometry from a Rich Graphic World", please click the "Cut a Geometry from a Rich Graphic World ppt" tag.
"Cut a Geometry" rich graphic world PPT courseware:
"Cut a Geometry" PPT courseware with rich graphic world introduces the principles of CT. In medical diagnosis, there is an instrument and method similar to cutting a geometry. This is a CT machine, which uses rays to examine a patient's diseased organ, just like using a knife to cut off a geometric object. ..
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Update Time: 2024-07-06
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