3 dimensional shapes have breadth, width and depth whereas 2 dimensional shapes have only breadth and width
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n * (n-3)/2
3 = 2 + 1.
Plane shapes are geometric shapes in 2 dimensions, but geometric shapes can also be in 1 dimension or 3 dimensions, or, for mathematicians, in more than 3 dimensions.Plane shapes are geometric shapes in 2 dimensions, but geometric shapes can also be in 1 dimension or 3 dimensions, or, for mathematicians, in more than 3 dimensions.Plane shapes are geometric shapes in 2 dimensions, but geometric shapes can also be in 1 dimension or 3 dimensions, or, for mathematicians, in more than 3 dimensions.Plane shapes are geometric shapes in 2 dimensions, but geometric shapes can also be in 1 dimension or 3 dimensions, or, for mathematicians, in more than 3 dimensions.
3-d shapes are not made from 2-d shapes. 3-d shapes may have projections onto a plane that are 2-d.
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