What is the area of a rectangle that is 4cm long and 2cm wide?


Each of the small squares has sides that are 1cm long, so they are square centimetres (cm2


). There are 4 rows of 2, so:


Length = 4cm Width = 2cm Area = 8cm2


So to work out the area of shapes like tables and notice boards – rectangles – we just need to know the length and the width of the rectangle.


How would you write down a rule for working out the area of a rectangle if you know the length and the width of the rectangle?


If the length and the width are measured in cm, then your answer should be in cm2 If the length and the width are in m, then your answer should be in m2


.


1. Work out the areas of these rectangles. a) length 25cm


width 16cm


d) length 17m width 27m


. 4cm


2cm


b) length 29cm width 18cm


e) length 35cm width 31cm


2. Work out the areas of these squares. a) length 23cm d) length 37cm


b) length 39m e) length 19m


c) length 32m width 24m


f) length 34m width 48m


c) length 14cm f) length 43m


3. Draw rectangles of these dimensions into your copy and write their areas under them. You may decorate the rectangles if you wish. Remember: the squares in your copies are not square centimetres.


a) Rectangle 1 length 6cm width 3cm


d) Rectangle 4 length 12cm width 5cm


b) Rectangle 2 length 4cm width 9cm


e) Rectangle 5 length 8cm width 7cm


c) Rectangle 3 length 7cm width 2cm


f) Rectangle 6 length 9cm width 10cm


Area 1


199


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