"Surface Area of Cuboids and Cubes" PPT courseware 3 on understanding cuboids and cubes

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Western Normal University Edition Fifth Grade Mathematics Volume 2	pptx	6 MB

"Surface Area of Cuboids and Cubes" PPT courseware 3 on understanding cuboids and cubes

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Upload Time: 2024-11-22

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Description

"Surface Area of Cuboids and Cubes" PPT courseware 3 on understanding cuboids and cubes

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 the area of each face of a cuboid and a cube.

3. Emotional goals: Understand the meaning of surface area in practical training, and cultivate students’ ability to observe and abstract.

A cuboid has a surface area of 474 square centimeters and its base is a square with side length 5 centimeters. What is its height in centimeters?

The two opposite faces, upper and lower, are square.

The front, back, left and right sides are rectangles with equal areas.

Solution: 474-5×5×2=424 (square centimeters)

424÷4＝106 (square centimeters)

106÷5＝21.2 (cm)

If a cuboid with a length of 12 cm, a width of 9 cm and a height of 5 cm is cut into 2 cuboids, what is the maximum total surface area of the 2 cuboids in square centimeters? How many square centimeters is it at least?

Solution: The total surface area is at most

(12×9+12×5+9×5)×2+12×9×2

=(108+60+45)×2+216

=213×2+216

=642 (square centimeters)

Summary of this lesson

In actual training, you can master the characteristics of cuboids and cubes and their side expansion diagrams.

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For more information about the PPT courseware "Understanding the surface area of cuboids and cubes and cuboids and cubes", please click the "Surface Areas of Cuboids and Cubes ppt Understanding cuboids and cubes" ppt tag.

"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 2 on the understanding of cuboids and cubes:

"Surface Area of Cuboids and Cubes" Understanding of Cuboids and Cubes PPT Courseware 2 Cuboids and cubes have 6 faces, which are the exposed parts of the cuboid or cube. We call these 6 faces the surface of the cuboid or cube. The area of all faces of an object..

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Update Time: 2024-11-22

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"Surface Area of Cuboids and Cubes" PPT courseware 3 on understanding cuboids and cubes