Area and Perimeter Worksheets Area and by lwa19935

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									  Area and Perimeter of
Composite polygonal shapes

 http://hench-maths.wikispaces.com
          Learning Sequence
1. Conversion of units
2. Perimeter of Polygons
3. Area of Polygons (individual shapes)
         Parallelograms, Triangles, Trapezium




4. Perimeter and area of compound shapes
   with polygons
        Preliminary Activities
• Digilearn: Area of Compound shapes Basic
     Complete at least 2 of these shapes
• Digilearn: Area of Triangles
     Complete at least one question at each level
• NVLM: Tangrams
     Do one tangram use hints if needed
• Digilearn: Compound shapes advanced
     Do at least two from the small category
After completing online activities
• Review the formulas for Perimeter and Area of
  polygons on the next slide


• View the animated worked example on the
  following slides


• Complete the written assessment task and hand
  it in for assessment
      Formulas for Quadrilaterals
Name            Shape   Perimeter   Area
Square                  P=4b        A=b2
Rectangle               P=2b+2h     A=bh
                        =2(b+h)
Parallelogram                       A=bh

Rhombus                 P=4b        A=bh

Trapezium                           A=1/2(b1+b2)h
                   Example
6cm



       8cm




             8cm




12cm
6cm


         8cm


12cm

             8cm
                   +   -
       4cm

 4cm
  12cm                     6cm


           8cm
                 +                8cm   -
                                                       4cm
                                            1

                           4cm                   4cm

                         1                          bh
A  bh               A  (b1  b2 ) h           A
                         2                            2
 12  8               1                          4 4
                       ( 6  4)  8           
 96cm 2               2                            2
                      40cm 2                    8cm 2

 Total Area = 96+40-8= 128cm2

								
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