Lesson 16: Bigger or Smaller

Many objects around us are in the shape of squares and rectangles.

How to differentiate these two biscuits?
Which shape do you think has a bigger area? square or rectangles?





Comparing areas of a square and a rectangle
For example : How many 1cm times 1cm squares are used to fill the 4cm times 4cm square and 8cm times 2cm rectangle?

 

Area = length times width                                    
        = 4cm times 4cm                                                  
        = 16 centimetre square 


      
Area = length times width
         = 8cm times 2cm
         = 16 centimetre square