The definition of equivalent is something that is ... having the same valence; Geom. equal in area, volume, etc., but not of the same shape.
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For a simply connected convex polyhedron , that is, shapes that are topologically equivalent to a sphere, F - E + V = 2 where F = faces, E = edges and V = vertices. For shapes that are topologically equivalent to a sphere with one hole in it (torus or doughnut shape), F - E + V = 0 For shapes that are topologically equivalent to a sphere with two holes in it F - E + V = -2 For shapes that are topologically equivalent to a sphere with three holes in it F - E + V = -4 and so on.
There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes.
Organic shapes are shapes with a natural look and a flowing and curving appearance.
Two types of shapes are 1. 1D Shapes 2. 2D Shapes Thanks Gaurang
Irregular shapes are all around. Most shapes are irregular.