Area and Perimeter 1. Look at these 2 rectangles that have exactly the same perimeter.


13cm 7cm


8cm


Perimeter = 42cm


14cm


Perimeter = 42cm


a) Will their areas be exactly the same? b) If not, which of the 2 rectangles will have the greater area? c) Now work out the areas of both rectangles and see if you were right.


2. Now try these. In each case, first guess which of the rectangles has the greater area and then check to see if you are right.


Rectangle A


Perimeter – 158cm Length – 48cm Width – ? Area – ?


Rectangle C


Perimeter – 206cm Length – ?


Width – 39cm Area – ?


Rectangle E


Perimeter – 232cm Length – 58cm Width – ? Area – ?


Rectangle B


Perimeter – 158cm Length – ?


Width – 27cm Area – ?


Rectangle D


Perimeter – 206cm Length – ?


Width – 48cm Area – ?


Rectangle F


Perimeter – 232cm Length – ?


Width – 43cm Area – ?


What conclusion can you draw from your answers? Is there any pattern? Discuss this with the people near you and then try to complete this sentence.


If 2 rectangles have the same perimeter, the rectangle with the greater area will be the rectangle whose dimensions are


. Area 1 195


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