Before you start to explain a pie chart you should have the following concepts:-
a title
a key
each piece of a pie chart labelled
a unit of measurement
Example
Look at the graph above, we can see that
Therefore we can say that:-
a title= Comparision of energy production
Date= 1995 and 2005
a key= no key
each piece of a pie chart labelled= other, nuclear, Petro, gas, coal
a unit of measurement= Percentage
Understanding the pie chart
Hence, it can be understood that in 1995, the highest production of energy was by the use of coal i.e. 29.8%.
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