A figure having no lines of symmetry is called figure.
A figure having no lines of symmetry is called an asymmetrical figure.
A figure having no line of symmetry is called an unsymmetrical figure.
A 6-sided figure with all its sides and angles equal is called a regular hexagon: How many lines of symmetry does a regular hexagon have?
The line which divides a figure into two equal parts is called the line of symmetry or axis of symmetry.