It has 4 sides and 4angles
Opposite angles of a parallelogram are congruent.
Consecutive angles of a parallelogram are supplementary.
Consecutive angles in a parallelogram are supplementary.
Except for the special case of a rectangle, a parallelogram must have two obtuse angles.
A parallelogram with 4 right angles is a rectangle.
A parallelogram has 4 interior angles that add up to 360 degrees
Such a parallelogram is a rectangle.
They can have any name that you want!
A rhombus.
360 degrees
Yes, opposite angles in a parallelogram must be equal.