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Slicing the Fourth

An Exploration of Dimensions and 4D Geometry What is the fourth dimension? What does it mean for there to be another? First, let's explain what a dimension is. In essence, a dimension is just a direction.

Well, try to imagine our entire universe-- everything, everywhere-- existing on a flat, three-dimensional 'hyperplane' (plane is specific to 2D). As Oliver, you can't turn towards \(w\), but you can still understand it's there by extending your knowledge of how a 2D creature might exist in a 3D world. Well, for those of you who haven't learned matrices yet, there's a great math tool called a rotation matrix.

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