- A shape is a graphical representation of an object’s form or its external boundary, outline, or external surface. It is distinct from other object properties, such as color, texture, or material type. In geometry, shape excludes information about the object’s location, scale, orientation and reflection. A figure is a representation including both shape and size (as in, e.g., figure of the Earth).
- Circle (Wikipedia)
A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius.