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Answer:
Area of each sector=
Step-by-step explanation:
We are given that
Length of each wooden od that connects the center of the fan to its edge ,r=12 cm
Total number of sectors=18
We have to find the approximate area of each sector.
Area of semi-circle=
Using the formula
Area of fan=
Area of each sector=
Area of each sector=
Where 
Area of each sector=