A geometric shape is a geometric figure that can be described with mathematics and that is used in geometry. The shape of such a figure is the geometric information which remains when location, scale and orientation are removed from the description of the object.
Many two-dimensional geometric shapes can be defined as a set of points or vertices and lines between the points. Such shapes are called polygons and include triangles, squares, and pentagons. Other shapes may be bounded by curves such as the circle or the ellipse.
- Kendall, D.G. (1984). "Shape Manifolds, Procrustean Metrics, and Complex Projective Spaces". Bulletin of the London Mathematical Society 16 (2): 81–121. doi:10.1112/blms/16.2.81.
See also 
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