A circle is a simple shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point.
A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.
In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or right angles).
In geometry, a pentagon is any five-sided polygon. A pentagon may be simple or self-intersecting.
Space is the boundless three-dimensional extent in which objects and events have relative position and direction.