Pentagon
a pentagon has 5 lines of symmetry
I believe that there is no such shape.
a pentagon
pentagon
A pentagon has 5 lines of symmetry and no right angle.
i think the shape is a 2-D closed figurethen it can be a pentagon
A regular pentagon.
A regular pentagon if your talking external walls, internal lines is a 5 pointed star.
There is no such shape. A 2d shape with 5 sides and all equal angles must be a regular pentagon (or a 5-pointed star if you stretch the definition of "all angles"). And a regular pentagon - or star - has 5 lines of symmetry.
5 lines of symmetry
Pentagon
Pentagon