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On paper = 2 dimensions Physical = 3 dimensions Examples: a square is 2 dimensions and a cube is 3 dimensions a circle is 2 dimensions and a ball is 3 dimensions
A ray can be in 2 dimensions, in 3 dimensions, or in fact in any number of dimensions.
In a rectangle, the longer side is referred to as the "length," while the shorter side is called the "width." These terms help distinguish the dimensions of the rectangle, with length typically representing the side that is longer. When discussing the area or perimeter, these dimensions are essential for calculations.
the plane, or xy plane, has two dimensions space has 3 dimensions
It is not possible. For example, the prism could be tall and thin, or short and thick, and either way have the same surface area.