EXPLANATION:
1.In the first square, since all its sides are equal, that is why it is classified as a parallelogram.This is a square.
2.This rectangle is a parallelogram because the opposite sides have the same length, also the opposite angles are equal.
3.This rectangle has two sides of equal length but all of its angles are right.
4.This square has all its sides of equal length as well as its internal angles are of the same measure.
