RS Aggarwal Solutions for Class 6 Maths Chapter 20 “Two Dimensional Reflection Symmetry Linear Symmetry” Reflection symmetry is a type of symmetry which is concerning reflections. Reflection symmetry is also known as line symmetry or mirror symmetry. It states that if there exists at least one line that divides a figure into two halves such that one-half is the mirror image of the other half. A figure is said to be symmetrical about l if it is identical on either side of l where l is known as the line of symmetry or axis of symmetry.