# Math and Arithmetic

## Math is the study of abstractions. Math allows us to isolate one or a few features such as the number, shape or direction of some kind of object. Then we can study what can be learned about the behavior of those features while ignoring everything else about the object.

###### Asked in Math and Arithmetic, Algebra, Geometry

### What has a single line of symmetry?

There could be many answers to this. If were thinking in terms of geometry:
>a triangle has between 1 and 3 lines of symmetry
>a square will always have 4 lines of symmetry.
Irregular shapes might have a single line of symmetry. For instance, a building may have a single line of symmetry.
>a line between two points may only have one line of symmetry. because it is only 2 dimensions, it is impossible for it to have more than one line of symmetry.