How many lines of symmetry does a parallelogram have?

How many lines of symmetry does a parallelogram have?

General parallelogram has no lines of symmetry.
Some specific types of parallelogram do. See below.
Rhombus is a special type of parallelogram and it has two lines of symmetry – its diagonals.
Rectangle which is not a square has two lines of symmetry – two lines going through the midpoints of opposite sides.
Square is a special type of parallelogram with four lines of symmetry – two diagonals and two lines going through the midpoints of opposite sides.

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