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Authoritative PPT Summary
"Understanding of Cuboids" Cuboids (1) PPT (Lesson 2)
Part One: Learning Objectives
1. Through observation, operation and other activities, understand what kind of surfaces can form a cuboid or cube, and understand the relationship between them.
2. Through cooperative learning, further accumulate inquiry experience, enhance spatial concepts, and develop mathematical thinking abilities.
3. Let students experience the connection between three-dimensional graphics learning and real life, enhance their interest in learning and their self-confidence in learning mathematics well.
[Key Points] Know what kind of faces can form a cuboid or cube, understand the relationship between them, enhance the concept of space, and develop mathematical thinking skills.
[Difficulty] Master the basic characteristics of cuboids and cubes, and understand the relationship between them.
PPT on understanding cuboids, part 2: exploration of new knowledge
fill in the blank:
A cuboid has ( ) faces. Each face is ( ), there may be two opposite faces ( ), the area of the opposite face is ( ), the cuboid has ( ) edges, the opposite edge length is ( ). The cuboid has ( ) vertices.
A cube is a three-dimensional figure surrounded by ( ) identical ( ). There are also ( ) edges, and their lengths are ( ). The cube has ( ) vertices. Since the sides of the cube are all equal in length, its length, width, and height are all called ( ).
Which of the following faces can form a cuboid? what are you thinking? Communicate with peers. (Unit: cm)
The two opposite faces of the cuboid are exactly the same. I first find three groups of faces that are exactly the same...
There is only one of ② and ③, so it cannot be used.
You can cut out a few shapes according to the pattern, do it, and think about it.
Which of the following faces can form a cuboid? (Unit: cm)
Mark the number of each face you selected on the cuboid below, and mark the length, width, and height of the cuboid.
The front and back are numbers ① and ⑧ respectively.
The left and right numbers are ④ and ⑥ respectively.
The upper and lower numbers are ⑤ and ⑦ respectively.
PPT on understanding cuboids, part 3: classroom exercises
1. The following figure shows the length, width and height of a cuboid:
Imagine:
1. What is the area of the left side of the cuboid in square centimeters?
5×7=35 (square centimeters)
2. Which surface has an area of 49 square centimeters?
7×7=49 (square centimeters)
above and below
2. The area of each face of this Rubik's cube is 100 square centimeters. What is its edge length? How many faces are exactly the same?
This Rubik's Cube is a cube, each face is a square, the area is 100 square centimeters, so its edge length is 10 centimeters, and six faces are exactly the same.
3. Use the following pieces of glass to make a fish tank. Which side of the fish tank will they be used for?
A is the bottom of the fish tank; C and D are the front and back of the fish tank respectively; E and B are the left and right sides of the bathtub respectively.
4. There are three identical digital building blocks, arranged as shown below. Take a look and think about it, the opposite of 5 is (), the opposite of 4 is (), and the opposite of 1 is ().
At least () small cubes of the same size must be used to form a larger cube.
A. 2B． 4
C． 6 D. 8
PPT on understanding cuboids, part 4: Class summary
1. The two opposite faces of the cuboid are exactly the same, and there are three sets of identical faces. Opposite ribs are of equal length, and there are three groups of the same rib length, each group containing four.
2. The six faces of the cube are identical. The twelve edges are all equal in length.
PPT on understanding cuboids, part 5: Classwork
Fill in the table with the areas of each side of the cuboid below. (Unit: cm)
A rectangular parallelepiped has a length of 36 cm, a length of 4 cm, a width of 3 cm, and a height of 36 cm.
Weld wire to form a rectangular frame 20 cm long, 15 cm wide, and 10 cm high. How many centimeters of wire are needed at least?
There is a 1 m long wire. After forming a cube, there is still 16 cm left. What is the edge length of the cube frame in centimeters?
Two rectangles with the same area of 90 cm², one is 10 cm long and 9 cm wide; the other is 15 cm long and 6 cm wide. Can they be used as opposite faces of a cuboid?
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For more information about the "Understanding of Cuboids and Cuboids" PPT courseware, please click on the PPT tag of "Understanding of Cuboids and Cuboids".
"Understanding of Cuboids" Cuboid (1) PPT Courseware (Lesson 2):
"Understanding of Cuboids" Cuboid (1) PPT Courseware (Lesson 2) Part One Content: Learning Objectives 1. Further master the characteristics of cuboids and cubes. (Key points) 2. Be able to use the characteristics of cuboids and cubes to solve some practical problems. (Difficulty) Review Guide...
"Understanding of Cuboids" Cuboids (1) PPT Courseware (Lesson 1):
"Understanding of Cuboids" Cuboid (1) PPT Courseware (Lesson 1) Part One: Learning Objectives 1. Understand the names of the parts of cuboids and cubes, further understand cuboids and cubes, and master the characteristics of cuboids and cubes. (Key points) 2. Be able to correctly distinguish...
"Understanding of Cuboids" Cuboid (1) PPT (Lesson 1):
"Understanding of Cuboids" Cuboids (1) PPT (Lesson 1) Part One: Learning Objectives 1. Understand cuboids and cubes through observation, operation and other activities, master the basic characteristics of cuboids and cubes, and understand the relationship between them. 2. Let students do...