The line which divides the figure into two equal parts is called the line of symmetry or axis of symmetry.
False
A type of symmetry in which a particular figure or shape is symmetrical about a particular line is called the linear symmetry.
The two parts are mirror images of each other.
For example, the diagonal of a rectangle divides the rectangle into two equal parts. However, they are not mirror images of each other.
So, the diameter of a rectangle is not the line of symmetry. Even though it divides the rectangle into two equal parts.