You cannot have a shaded area of 4 cm since area cannot be measured in centimetres.
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96 sq. cm
What do you call shaded part?
Either directly or by finding the area of the whole and subtracting the area of the non-shaded part.
This question needs additional information, To get the area of the shaded area get the difference between the total area and the un-shaded region.
Area : 44cm² Perimeter : 30cm