2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
2 lines of symetry
A rectangle has 2 lines of symmetry
A rectangle.
2 lines of Symetry
A regular octogan has 8 lines of symetry, and a irregular octogan has 2 lines of symetry.
2
Two (2)
Infinite
2 lines of symetry
A rectangle has 2 lines of symmetry
A rectangle.
They both have 2 lines of symetry
Square, Rectangle
Two (the diagonals, from corner to opposite corner)
The front of the envelope would have 1, while the back would have 2.