How many lines of symmetry does a plolygon have?
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.