How many lines of symmetry does a parallelogram have and how???
A parallelogram has 0 line of symmetry . You can draw no such line in which they are congruent to each other. You can try it on paper to see that it has no line of symmetry .
Hope this would have cleared your doubt.
Many people think that a parallelogram has four lines of symmetry. But a parallelogram has no lines of symmetry. A line of symmetry is a line through which if we fold, the two halves will overlap each other exactly, in other words, the two halves will be congruent. But in a parallelogram, the two halves will not overlap each other exactly. You can try this out yourself by cutting out a parallelogram from a piece of paper and fold it in half.
Hope this clears your doubt,