false
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There are none.A square is a 2-dimensional object and so there cannot be any 3-dimensional objects in it.
false Actually, the statement is true. You can imagine a 3-d object being made up of a lot of 2-d objects stacked on top of one another. But remember that, by definition, a 2-d object has no thickness (or, in this case, height). Height of one 2-d obect = 0 so height of n such objects = n*0 = 0 So a stack, no matter how many objects you use, will remain 0. And so you are not building up a 3-d object. Alternatively, you could imagine a cube (3-d) being built up from 6 square faces (2-d). Except that this is just the shell of the 3-d object, not the 3-d object itself.
Two-dimensional objects
neutral point
An objects motion or speed is distance divided by time.