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A 3D shape stands for Three-Dimensional. The three dimensions are Height, Width and Depth. A line just has height, so it is 1D. A polygon has both Height and width so it's 2D. A three dimensional object has all three; Height, Width and Depth.________^Height/Length = 1D-------------------| || | Depth |/ |----------------- |
Height , width and depth .
Height, width, depth
Three and three fourths plus three is six and three fourths.
Three fourths, two fourths, three fourths.