parallelogram is a special kind of quadrilateral which, in turn, is a special kind of polygon and that is a closed planar figure.
They can have any name that you want!
Parrallelogram, quadrilateral, square... PLEASE ADD
Yes, the diagonals of a parallelogram bisect each other.
yes
No.
no
Yes and the diagonals are not equal in length
4
yes
Yes.
No, a parallelogram is not a trapezoid.
parrallelogram