A parrellelogram is just a rectangle tilted. If you were to push the ends up straight, you would have a rectangle. So all you do is multiply the base times the height. It's that simple!
i dont knowww
A square is always a parellelogram since it has equal sides.
It depends on what x is - an angle, a side, a diagonal, etc
yes
NO.
No.
Not usually,
not always
yes
Yes.
Squish it!
(number of sides-2) x 180 = (4-2)180=360