In geometry, a primitive is the simplest kind of figure. More complex figures are built up by combining primitives.

There is no rigorous, logical definition of a primitive. What counts as a primitive and what does not is largely a matter of personal opinion and convention, and varies depending on the context.

Commonly used geometric primitives include:

• points
• lines and line segments
• planes
• circles and spheres
• triangles and other polygons

Základní geometrické útvary