-CUADRILATERALS:They are poligons with:

• Four sides equals.
• Four angles equals.
  

-PARALLELOGRAMS:They are cuadrilaterals with:

• The sides are parallel opposite.
• The angles are equals 2 by 2.  
• 
  SQUARE                          RECTANGULE
   

 
1º 4 sides equals.                 1º 4 sides=equals 2 by 2

2º 4 angles equals.               2º 4 angles= equals  90º                

 

                                                  ROMBUS
                                        

1ºFour sides equal.

2ºFour angles two by two.               

                                                                                                                        RHOMBOID         

                                                                1ºFour angles equal two by two

                                                                2º Four sides equal two by two