If having two dimensions, height and width, means that a diagonal line is just a

If having two dimensions, height and width, means that a diagonal line is just a

If having two dimensions, height and width, means that a diagonal line is just a tiny line up connected to a tiny line across, repeated on a level so small we don't notice and the line appears diagonal, does that mean that everything in our 3D world is almost 'pixelated' at a really microscopic level? Sorry, I'm having problems describing what I mean but see if you can make any sense of that. =) Thanks.

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