square and rhombus
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Yes, a parallelogram has four sides and four internal angles, the opposite side lengths are equal and the opposite angles are equal.
A parallelogram with 4 equal right angles is a rectangle.
A parallelogram. (A rectangle if the angles are 90o)A parallelogram (which may also be a rectangle, if all four angles are equal to 90°)
it is a rhombus
A parallelogram is a four sided polygon with opposing parallel sides of equal length. Then if it has four right angles, the polygon becomes a rectangle.