No.
Pi is a ratio.
Area is... not.
You should read a book.
Or explain why you think this is correct, not just drop a picture and not give any explanation.
The area in your little picture, assuming a unit diameter, is ~.2146 square units. Not even close to pi. Maybe if the diameter of the circle is 14.6391694653.
Source: I have a calculator and know how to use it.
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