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

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

1. What is the surface area of ​​cuboid and cube?

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?

What is the surface area of ​​cuboids and cubes?

The total area of ​​the six faces of a cuboid or cube is called its surface area.

Surface area of ​​cuboid = length × width × 2, length × height × 2, width × height × 2

Surface area of ​​cuboid = (length × width + length × height + height × width) × 2

Surface area of ​​cube = edge length × edge length × 6

To make a microwave oven packaging box, (as shown on the right), how many square meters of cardboard should be used at least?

Solution one:

0.7×0.5×2+0.7×0.4×2+0.5×0.4×2

= 0.7+0.56+0.4

=1.66 (square meters)

Answer: Use at least 1.66 square meters of cardboard.

Solution two:

(0.7×0.5+0.7×0.4+0.5×0.4)×2

=(0.35+0.28+0.2)×2

= 0.83×2

= 1.66 (square meters)

Answer: Use at least 1.66 square meters of cardboard.

A cube gift box has a side length of 1.2dm. How many square decimeters of wrapping paper should be used to wrap the gift box? .

Edge length × Edge length × 6

1.2×1.2×6

=1.44×6

=8.64(dm2)

Answer: Use at least 8.64 square decimeters of wrapping paper to wrap this gift box.

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Update Time: 2024-11-01

This template belongs to Mathematics courseware Jiangsu Education Edition Sixth Grade Mathematics Volume 1 industry PPT template

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