Yes it is one
rectangle or paralellogram
Yes it has to be just as a square
Yes. A square is a special case of a parallelogram.
paralellogram
8.5
2 times length times 2 times width
no
If you are refering to a rectangle or paralellogram the the area will be 3 times. L x W = A 3L x W = 3A
Yes
Normally the area of a parallelogram is base times perpendicular height.
Yes it is one
It can be in some cases.
No, but a parallelogram is a quadrangle.
No.
4
Yes, it is a parallelogram.