Cuadrilaterals: They are polygons with four sides and four vertices.
Parallelograms: They are equilaterals with two pairs of parallels opposite equal sides and two pairs of opposite equal angles, their diagonals bisect each other.
Square:
Four sides equal.
Four angles equal 90 º.
Two diagonals.
Rectangule
Four sides equal two by two.
Four angles equal 90 º.
Rombus
Four sides equal.
Four angles two by two.
Rhomboid
Four sides equal two by two
Four angles equal two by two.