Yes, it can... but does not have to. A parallelogram is a four-sided plane figure with opposite sides parallel. So as long as it has opposite sides that are parallel, it is a parallelogram.
Parallelograms do not have right angles. A rectangle is a parallelogram but a parallelogram is not a rectangle.
When the corner angles are right-angles (90 degrees)
Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.
Rectangles are parallelograms with right angles.
Both a square and a rectangle are parallelograms with 4 right angles
No, because to have a rectangle, you need to have four right angles, and parallelograms dont have to have right angles. However, all rectangles are parallelograms.
Parallelograms do not have right angles. A rectangle is a parallelogram but a parallelogram is not a rectangle.
Parallelograms do not have right angles. A rectangle is a parallelogram but a parallelogram is not a rectangle.
When the corner angles are right-angles (90 degrees)
Generally, there are no right angles in a parallelogram, but rectangles and squares can be seen as special parallelograms, as they have all the qualities needed to be classed as parallelograms, and in addition, they have four right angles.
Rectangles are parallelograms with right angles.
Squares
Rhombi (or rhombuses)
Nope! :D
Both a square and a rectangle are parallelograms with 4 right angles
All parallelograms are not rectangles. The angles of a parallelogram need not be right angles and so the figure need not be a rectangle.
a parallelogram is a 4 sided polygon with two pair of parallel sides. So squares and rectangles are parallelograms since they have 2 pair of parallel sides and yes they have right angles, BUT most parallelograms do not have right angles. So the answer is it may have them, but does not need to have them