MATH LESSON FOLLOW UP: quadrilaterals
                       Click[HERE]for original lesson

Author:  Dr. Mavis Kelley 

  TEACHER'S NOTE: This is a possible follow-up lesson using the same set 
  of quadrilaterals from the other post. (See Geometry Lesson)

                        Activities with Quadrilaterals
                                Dr. Mavis Kelley
                           University of North Dakota

  The following are possible extensions on the quadrilateral activity, 
  using the same set of cut-out shapes.

        1)  Which of your shapes has a right angle?  Sort them.  Prove it 
        for each right angle.  Which of your shapes is made of all right
        angles?

        2)  Which of the shapes is a rectangle?  Be prepared to discuss 
        your thinking for each shape.  Sort the rectangles into two piles 
        and describe each pile.

        3)  How are all these shapes alike?  Different?

        4)  Can a square be a rectangle?  Is a square always a rectangle?
        Explain with examples.

        5)  Can a rectangle be a square?  Is a rectangle always a square?
        Explain, using examples.

        6)  Which shapes have symmetry?  Do these shapes have anything else
        in common?  Do any shapes have more than one line of symmetry?

        7)  Which of these shapes have both pairs of opposite sides that 
        are congruent?

        8)  Which of these shapes have both pairs of opposite sides that 
        are parallel?

        9)  Which of these shapes are similar?

       10)  Write  your own question or discovery.

  Discovery:  The number of sides does not determine the shape.  In other
  words, all of these shapes have four sides yet they are different shapes.

  A quadrilateral can look very different, just like there are many 
  different triangles.