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"Surface Area of Cuboids and Cubes" Cuboid PPT Courseware
Example 1: How many square centimeters of cardboard should be used to make a rectangular carton with a length of 6 centimeters, a width of 5 centimeters, and a height of 4 centimeters?
Think: The cuboid has 6 faces, each of the upper and lower faces is ( ) centimeters long, ( ) centimeters wide, and the area is ( ) square centimeters;
Each front and rear surface is ( ) centimeters long, ( ) centimeters wide, and the area is ( ) square centimeters;
Each side on the left and right is ( ) centimeters long, ( ) centimeters wide, and the area is ( ) square centimeters.
Do it: A cuboid is 4 meters long, 3 meters wide and 2.5 meters high. What is its surface area in square meters? (Calculated using two methods.)
Solution 1: 4×3×2+4×2.5×2+3×2.5×2=24+20+15=59 (square meters)
Solution 2: (4×3+4×2.5+3×2.5) ×2=(12+10+7.5) ×2=29.5×2=59 (square meters)
The length of the front face is ( ) decimeters, the width is ( ) decimeters, and the area is ( ) square decimeters.
The length of the left side is ( ) decimeters, the width is ( ) decimeters, and the area is ( ) square decimeters.
The length of the surface above is ( ) decimeter, the width is ( ) decimeter, and the area is ( ) square decimeter.
1. Decide whether it is right or wrong and explain the reasons:
1) A cuboid with equal length, width and height is called a cube. ( )
2) For a cube with an edge length of 4 decimeters, its surface area formula is 4²×6, and the result is 48 square decimeters. ( )
3) Use four small cubes of the same size to form a cuboid. The surface area of this cuboid is smaller than the sum of the surface areas of the original four small cubes. ( )
2. What is the surface area of a cube?
The total area of the six faces of a cube is called its surface area.
3. How to calculate the surface area of a cube?
Edge length × Edge length × 6 or Edge length² × 6
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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...