"Surface Area of ​​Cuboids and Cubes" PPT Courseware of Cuboids and Cubes

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"Surface Area of ​​Cuboids and Cubes" PPT Courseware of Cuboids and Cubes

1. Review old knowledge

A cuboid is generally a three-dimensional figure surrounded by 6 ( ) (in special cases, there are two opposite faces ( )).

In a cuboid, there are opposite faces ( ) and opposite edges ( ).

A cube is a three-dimensional figure surrounded by 6 ( ).

2. Explore new knowledge

Please mark the 6 sides with "upper", "lower", "front", "back", "left" and "right" in the expanded diagram below.

Observe the unfolded diagram of the cuboid. Which faces have equal areas? What is the relationship between the length and width of each face and the length, width and height of the cuboid?

In the unfolded diagram of the cuboid, the areas of the "upper" and "lower", "front" and "back", and "left" and "right" sides of the cuboid are equal respectively. The length and width of each face are the length, width, and height of the cuboid respectively.

How many square meters of cardboard should be used to make a microwave oven packaging box?

Each of the upper and lower sides is long _____, wide _____, and has an area of ​​_______;

Each side of the front and back is _____ long, _____ wide, and has an area of ​​_______;

Each of the left and right sides is _____ long, _____ wide, and has an area of ​​_______.

3. Application of knowledge

After folding, which shapes can form the cube on the left? Draw "√" in the brackets.

Liangliang's family needs to provide a simple wardrobe with a cloth cover that is 0.75m long, 0.5m wide and 1.6m high (as shown below, without a bottom). How many square meters of cloth are needed at least?

0.75×0.5+0.5×1.6×2+0.75×1.6×2＝0.375+1.6+2.4＝4.375(m2)

Answer: At least 4.375m2 of cloth is required.

4. Assign homework

Homework: Exercise 6 on page 25, Questions 1, 2, and 4.

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"Surface Area of ​​Cuboids and Cubes" Cuboids and Cubes PPT Courseware 6:

"Surface Area of ​​Cuboids and Cubes" Cuboids and Cubes PPT Courseware 6 1. What is the surface area of ​​cuboids and cubes? 2. How to calculate the surface area of ​​cuboid and cube? 3. What are the applications of surface area calculation of cuboid and cube in daily life? ..

"Surface Area of ​​Cuboids and Cubes" Cuboids and Cubes PPT Courseware 5:

"Surface Area of ​​Cuboids and Cubes" Cuboids and Cubes PPT Courseware 5 1. A cuboid has ( ) faces. Generally, each face is ( ). In special cases, there are two faces ( ), and the ( ) of the opposite faces are equal. . 2. A cuboid has ( ) vertices, (..

"Surface Area of ​​Cuboids and Cubes" PPT Courseware 3 on the understanding of cuboids and cubes:

"Surface Area of ​​Cuboids and Cubes" Understanding of Cuboids and Cubes PPT Courseware 3 Teaching Objectives 1. Knowledge Objectives: Through the explanation and observation of examples, further consolidate the characteristics of cuboids and cubes and their side expansion diagrams. 2. Ability goal: be able to calculate long...

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Update Time: 2024-11-21

This template belongs to Mathematics courseware People's Education Press fifth grade mathematics volume 2 industry PPT template

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