| Category | Format | Size |
|---|---|---|
| Beijing Normal University seventh grade first volume mathematics | pptx | 6 MB |
"Expand and Fold" Rich Graphic World PPT Courseware 4
Description
"Expand and Fold" Rich Graphic World PPT Courseware 4
Knowledge preparation
1. Definition
In a prism, the intersection of any two adjacent faces is called an edge.
In a prism, the intersection of two adjacent sides is called a side edge.
2. Types of prisms
Three prisms, four prisms, five prisms, six prisms,...
n-prism: A prism whose base is an n-gonal shape is called an n-prism.
Characteristics of prisms
(1) All side edges of a prism are equal in length.
(2) The upper and lower bases of the prism have the same shape.
(3) The sides of the prism are all rectangular in shape.
(4) The number of sides is equal to the number of sides of the bottom figure.
Do it
1.As shown in the figure:
⑴ A cuboid has _____ vertices, _____ edges, and _____ faces. The shape of these faces is _____.
⑵ Which faces must have exactly the same shape and size?
⑶ Which edges must have equal lengths?
2. As shown in the figure, the hexagonal prism has a base length of 5 cm and a side edge of 4 cm. Observe and answer the questions:
1) How many faces does this hexagonal prism have? What are their shapes? Which faces have exactly the same shape and area?
2) How many edges does this hexagonal prism have? What are their lengths?
summary
⒈Understand the main characteristics of prisms.
⒉Understand the unfolding and folding of prisms.
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For more information about the PPT courseware "Expand and Fold the Rich Graphic World", please click the Expand and Fold ppt Rich Graphic World ppt tag.
"Expand and Fold" PPT:
"Expand and Fold" PPT Part One: Analysis of Examples Example 3. Cut a rectangular paper box and spread it into a flat surface. This was cut by me. What I cut is like this. The above figures are called flat expansion diagrams of a cuboid. Observe the expansion diagrams you cut and tell me...
"Expand and Fold" Rich Graphic World PPT Courseware 3:
"Expand and Fold" Rich Graphic World PPT Courseware 3 Think about it: The following graphics are expanded diagrams of some common geometries. Can you correctly name the names of these geometries? Question 1. Since they are all cubes, why are the plane shapes cut out different?...
"Expand and Fold" Rich Graphic World PPT Courseware 2:
"Expand and Fold" Rich Graphic World PPT Courseware 2 There are 10 unshaded squares on the cardboard as shown in the picture. Choose one of them and fold it together with the 5 shaded squares in the picture to form a cube packaging box. How many different ways to choose. As shown in the picture is a...
File Info
Update Time: 2024-07-31
This template belongs to Mathematics courseware Beijing Normal University seventh grade first volume mathematics industry PPT template
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