Farmer Ann builds 2 pig-pens using fencing.
                          How big is each pig pen? 
                How much fencing was used for each pig pen?
           1 m                        2                    2
                      Area =      6 m      Area =       5 m
                      Perimeter =  10 m    Perimeter =  10 m
           1 m2
        For every polygon (flat shape) we can find the size of…
      the  area              1 m
        (the surface)             1 m2
          Imagine: 
       the space to move
         Area = 6 m2
 & the  perimeter
         (the edge)
          Imagine: 
     walking around the outside
      Perimeter = 10 m
           These are compound shapes,
      they are made up of 2 or more rectangles or squares.
        How would you divide the shapes into parts?
  overlapping
    1 cm  1 cm2                                  How many different shapes can you draw 
                                                       with a perimeter of 10 cm2  ?
                                                     What is the area of each shape?
                             6 cm2
            4 cm2
                                                           5 cm2
    Why don’t these shapes        4 cm2
         have a pair?
                          4 cm2                             4 cm2
     How can we find the missing lengths in these diagrams?
                    2
       6                  6?
            3
        9?               8
              8?        7
   12             10      4?
        4                       7
 (not drawn accurately)