| Category | Format | Size |
|---|---|---|
| Qingdao Edition Seventh Grade Mathematics Volume 1 | pptx | 6 MB |
"The Graphic World Around Us" PPT courseware
Description
"The Graphic World Around Us" PPT courseware
Are you familiar with the various three-dimensional shapes in (Figure 1-1)? Use lines to connect shapes to their corresponding names.
Cubes, cuboids, cylinders, cones, spheres, etc. are all geometric entities. The prisms (Figure 1-2) and pyramids (Figure 1-3) in the figure below are also geometric entities. Geometry is referred to as body.
How many faces does the geometry in Figures 1-2 and 1-3 have? How many faces does a ten-prism have? How many faces does a ten-pyramid have?
Their faces are all flat, and geometric bodies like this are also called polyhedrons.
practise
1. Name the following geometric entities:
cone pyramid cylinder prism
2. Observe the following physical pictures. What kind of geometric objects are their shapes similar to?
(1) Like a cuboid; (2) Like ______; (3) Like ______; (4) Like ______;
Classroom section
Classification of common three-dimensional graphics:
Three-dimensional graphics
cylinder
cylinder
prism
Triangular prism Four prism Pentagonal prism Six prism
cone
cone
pyramid
Three-sided pyramid Four-sided pyramid Five-sided pyramid Six-sided pyramid
Taiwan body
round cone prism
sphere
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"The Graphic World Around Us" PPT Courseware 2:
"The Graphic World Around Us" PPT Courseware 2 Communication and Discovery (1) Observe the two pictures in Figure 15. Which surfaces do you find are flat? Are those noodles curved? (2) Can you give examples of real objects with flat or curved surfaces? In mathematics, there is no plane...
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Update Time: 2024-07-04
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