What is a basic figure that is not defined in terms of other figures examples are points lines and planes?

A basic figure that is not defined in terms of other figures is a point. A point represents a specific location in space and has no dimensions—neither length, width, nor height. It serves as a fundamental building block in geometry, used to define other figures such as lines and shapes. Other examples of basic figures include lines and planes, which also stand alone without needing further definition.