Question

Question #27829

Answer 1

Actually, some parallelograms have lines of symmetry. Others don't

Explanation:

Rhombi and squares actually have lines of symmetry:

So do rectangles:

But some parallelograms don't:

It's simply a matter of the side lengths and angles in some parallelograms, which separate them and determine whether or not they have symmetry.

I hope that helps!