What Shape has only One Line of Symmetry
https://www.youtube.com/watch?v=vEro2-qcFqU
Line of symmetry
A symmetrical figure has a line of symmetry (or mirror symmetry or reflection symmetry). If there is a line about which it can be folded so that the two equal parts of the figure coincide, that line is called the line of symmetry or line of reflection. Look at these figures:
There is also a line of symmetry in nature but normally we do not notice it.
Example: Look at the pictures given below:
Now, look at these pictures
If we try to fold the letters J and N, along a line in such a way that it is divided into two equal parts, it appears impossible. Such figures are called non- symmetrical figures.
The term ‘line of symmetry’ is often referred to as ‘reflection symmetry’ because the concept of symmetry is very close to the concept of reflection. When we place any object in front of a mirror, we get an identical image of the object of the same shape and size.
In both the cases above, we see identical shapes of the same size, which are inverse in direction. Similarly, when an object reflects its image in water, it is considered to have a line of symmetry along the waterline. See the pictures given below:
