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25 votes
how could you find the combined area of all faces of a three-dimensional shape and give an example of why that would be a good measurement to know

User Admiral Land
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1 Answer

25 votes
25 votes

The cuboid is a 3-dimensional shape formed from 6 rectangular faces

The surface area of it is the sum of the areas of its 6 faces

Every two opposite faces have the same areas

Its dimensions are length, width, and height

Its surface area = 2[length x width + length x height + width x height]

This means we multiply every two dimensions and add the answer then multiply the sum by 2

Let us take an example

If the dimensions of a cuboid are 2 cm, 3 cm, and 5 cm

Then let:

Length = 2 cm

Width = 3 cm

Height = 5 cm

The surface area = 2[2 x 3 +

User Kiaurutis
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3.6k points
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