It depends on the information that you have.
If you know that they are cubes, rather than cuboids, you could show that a side of one is the same length as a side of the other, or that the area of a face of one is the same as that of the other or that the volume of one is the same as that of the other.
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(surface area of cube 1 or 2 (either)) times 2 = (total surface area of two identical cubes)
You can prove by making two or more identical triangles.Congruence means when two figures have the same size, form, and shape.
There are 36 possible outcomes. But if the cubes are identical, then for every possible outcome, there's another one that looks just like it, so only 18 that you can identify.
Coal cubes: 0. Sugar cubes: 0 Painted cubes: maybe some of them.
When all the dimensions and angles are identical.