Area of circle is wrong #4
Description
area of circle is pi*r^2
not 4pir^2
in https://github.com/RoRoJ/python_practice/blob/main/2_python_functions.ipynb
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area of circle is pi*r^2
not 4pir^2
in https://github.com/RoRoJ/python_practice/blob/main/2_python_functions.ipynb