"Understanding of Cuboids and Cubes" Cuboids and Cubes PPT Courseware 3

Description

"Understanding of Cuboids and Cubes" Cuboids and Cubes PPT Courseware 3

teaching objectives

By putting pendulums together, find out the rules and summarize the volume formula.

Can use formulas to correctly calculate the volume of cuboids and cubes.

Cultivate students' thinking quality of active thinking and exploring new knowledge.

discuss:

1. How many faces does a cuboid have? What is the relationship between the position and size of the surface?

2. How many edges does a cuboid have? What is the relationship between the position and length of the ribs?

3. How many tops does a cuboid have?

practise:

1. Fill in the blanks orally based on the data in the figure: Figure 1: The length of the cuboid is ( ) centimeters, the width ( ) centimeters, and the height ( ) centimeters. The sum of the lengths of the 12 edges is ( ) centimeters.

Figure 2: The geometric solid in this picture is ( ), and the sum of the 12 edge lengths is ( ) decimeter.

Figure 3: A cuboid whose length, width, and height are 9 cm, 3 cm, and 2.5 cm respectively. The length on it is ( ) centimeters, the width is ( ) centimeters, the length of the left side is ( ) centimeters, and the width is ( ) centimeters. The sum of the lengths of the three edges that intersect at a vertex is ( ) centimeters.

2. Judgment. If the correct answer is correct, please put "√" in the bracket, and if the incorrect answer is incorrect, please put "×" in the bracket.

(1) The six faces of a cuboid must be rectangles; ( )

(2) The areas of the six faces of the cube must be equal; ( )

(3) A cuboid (non-cube) has at most four faces with equal areas; ( )

(4) A cuboid with three equal edges intersecting at a vertex must be a cube. ( )

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Update Time: 2024-11-22

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

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