Find the area of the shaded region in the following figure. 
Definitions:
Cell Membrane
The semipermeable membrane surrounding the cytoplasm of a cell, controlling the passage of substances in and out.
Cytoplasm
The jelly-like substance within a cell that contains organelles, providing a medium for cellular processes to occur.
Nucleus
A membrane-bound organelle found in eukaryotic cells, containing most of the cell's genetic material.
Smooth
A type of involuntary muscle tissue found in internal organs.
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