Yes
2
paralellagram
Not normally unless it is in the shape of a rectangle.
Two (or none, if it is a rectangle).
It depends on what measure is missing.
Paralellagram
base times height is area
Yes, all sides and angles are equal and parallel.
Paralellagram, Square or Rectangle
They are all misspelled.
It belongs in the class of quadrilaterals that all have 4 sides