That IS a parrallelogram!
Yes, a rectangle is a special case of a parallelogram, where each of the 4 angles = 90°
A parralleogram is a quadrilater so a shape with 4 sides that has equal opposites
Vertically opposite angles. (vert. opp.)
Yes, opposite angles in a parallelogram must be equal.
a parallelogram has parallel opposite sides and its opposite angles are congruent
Yes, both pairs of opposite angles in a parallelogram are congruent.
Parrallelogram (it has rotational symmetry but no lines of symmetry)
Consecutive angles of a parallelogram are supplementary.
Consecutive angles in a parallelogram are supplementary.
A parallelogram with 4 right angles is a rectangle.
Such a parallelogram is a rectangle.
They can have any name that you want!