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Description: Three-dimensionalnn“ We live, in fact, in the three dimensional world. What we see in front of us is notna flat picture with length and breadth only, but an expanse with physical depth,nthe third dimension. The ground underneath our feet stretches all the way to thendistant horizon. We can look straight ahead, look back, look to the left, look to thenright, look up, and look down. What we see is a continuum of space in which wenare enveloped. There are many objects nearby which we can touch, a
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