Here mine dog "Flame" has actually her face made perfect symmetrical v a bitof photograph magic.
The white line down the center is present of Symmetry
When the folded part sits perfect on top (all edges matching), climate the wrinkles line is a heat of Symmetry.
Here I have folded a rectangle one way, and it didn"t work.
But as soon as I shot it this way, that does work (the folded part sits perfectly on top, all edges matching):
Triangles
A Triangle have the right to have 3, or 1 or no currently of symmetry:
 |  | |||
| Equilateral Triangle(all sides equal, all angle equal) | Isosceles Triangle(two political parties equal, 2 angles equal) | Scalene Triangle(no sides equal, no angle equal) | ||
| 3 currently of Symmetry | 1 heat of Symmetry | No lines of Symmetry |
Quadrilaterals
Different species of quadrilaterals (a 4-sided aircraft shape):
 |  | |||
| Square(all sides equal, all angles 90°) | Rectangle(opposite sides equal, all angle 90°) | Irregular Quadrilateral | ||
| 4 present of Symmetry | 2 currently of Symmetry | No present of Symmetry |
 |  | |
| Kite | Rhombus(all sides same length) | |
| 1 line of Symmetry | 2 present of Symmetry |
Regular Polygons
A continual polygon has actually all sides equal, and all angle equal:
| An Equilateral Triangle (3 sides) has 3 currently of Symmetry | ||
| A Square (4 sides) has 4 present of Symmetry | ||
 | A Regular Pentagon (5 sides) has 5 present of Symmetry | |
 | A Regular Hexagon (6 sides) has 6 currently of Symmetry | |
 | A Regular Heptagon (7 sides) has 7 currently of Symmetry | |
 | A Regular Octagon (8 sides) has 8 present of Symmetry |
And the pattern continues:
A continual polygon that 9 sides has actually 9 lines of SymmetryA regular polygon of 10 sides has 10 currently of Symmetry...A regular polygon the "n" sides has actually "n" currently of SymmetryCircle |