The correct response is: A parallelogram has four lines of symmetry: horizontal through the midpoints, vertical through the midpoints, and both diagonals.
In a parallelogram, there are indeed four lines of symmetry:
- One vertical line through the midpoints of the top and bottom sides,
- One horizontal line through the midpoints of the left and right sides,
- One diagonal line from one vertex to the opposite vertex, and
- Another diagonal line from the other pair of opposite vertices.
Thus, a parallelogram is symmetric with respect to these four lines.