A triangle has 3 lines of symmetry.
Eqiilateral trangle i
3
No, a polygon can have fewer lines of symmetry.
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)
an irregular polygon
It depends on how many sides that it has and whether of not it is regular (all the lines of the polygon are of equal length if it is a regular polygon). For regular polygons, the number of symmetry lines is the number of sides if number of sides is an odd number. Otherwise, the number of symmetry lines is double the number of sides. A square has 4 sides and 8 symmetry lines; a triangle has 3 sides and 3 symmetry lines.
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:)