A shape is the form of an object or its external boundary, outline, or external surface, as opposed to other properties such as color, texture, or material composition.
Psychologists have theorized that humans mentally break down images into simple geometric shapes called geons.<ref>Marr, D., & Nishihara, H. (1978). Representation and recognition of the spatial organization of three-dimensional shapes. Proceedings of the Royal Society of London , 200, 269-294.</ref> Examples of geons include cones and spheres.
Intro Classification of simple shapes Shape in geometry Shape analysis Similarity classes See also References External links
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