Is a square a parallelogram

Yes, a square is a parallelogram, but we'd call it a "special type" of parallelogram.

A square is also a special type of rectangle, rhombus, and quadrilateral.

Properties of a parallelogram:

• Interior angles add up to 360 degrees
• Exterior angles add up to 360 degrees
• Opposite sides are congruent
• Opposite sides are parallel
• Opposite angles are congruent
• Adjacent angles are supplementary
• Diagonal midpoints make perpendicular lines

A square satisfies all of those requirements.