A shape has line symmetry when one half of it is the mirror image of the other half.
All About Symmetry
Ninja One – ‘The blue line you can see is called the Line of Symmetry’
Ninja Two – ‘The line of symmetry divides the subject into two identical pieces’
Symmetry exists all around us and many people see it as being a thing of beauty.
Symmetry in the Animal World
Explore Line Symmetry in the Body Shape & Colors of a Butterfly
Check Out Bi-lateral Symmetry in Insects
Arachnids & Symmetry
Investigate Line Symmetry as one side being the Mirror Image of the Other