NCERT Solution Class X Mathematics Areas Related to Circles Question 14 (Ex 12.3)

Question 14:

AB and CD are respectively arcs of two concentric circles of radii 21 cm and 7 cm and centre O (see the given figure). If ∠AOB = 30°, find the area of the shaded region.  [Use π = 22/7]

Answer:

 

Area of the shaded region = Area of sector OAEB − Area of sector OCFD

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