A rectangle (that is not also a square) or a rhombus (that is not also a square). Squares have 4 symmetry lines.
Rectangle
Equilateral Triangles (3 lines of symmetry)Rectangles (at least 2 lines of symmetry)Squares (4 lines of symmetry)Rhombuses (at least 2 lines of symmetry)Any regular polygon (at least 5 lines of symmetry)
No, a polygon can have fewer lines of symmetry.
an irregular polygon
A triangle has 3 lines of symmetry.
parallelogram
Number of lines of symmetry = Number of sides of the regular polygon
I think that it can have 0, 1, 2, 3, 6, 9 or 18 lines of symmetry.
10 lines. Regular polygon of "x" sides has "x" Lines of Symmetry
a polygon
A 15 sided polygon has 15 lines of symmetry;) Thanks for asking:)
A polygon need not have any lines of symmetry. The maximum number of lines of symmetry is attained if the polygon is regular; and this is the number of sides (or vertices) of the polygon. If a regular polygon has an even number of sides, then the lines of symmetry are those joining opposite vertices, and those joining the mid-points of opposite sides. If the polygon has an odd number of sides/vertices, the lines of symmetry are those joining each vertex to the mid-point of the opposite side.