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CD = CO = 7cm
But CO = 1/2 OB
=> OB = 14 cm
Area of shaded region = Area of quadrant AQBO - Area of semicircle ODBO
=> (1/4 pi (14)^2 ) - ( 1/2 pi (7^2))
=> 1/2 ( 0.5 * 196 - 49 )
=> 1/2 ( 98 pi - 49 pi)
=> 1/2( 49 pi)
=> 77
But CO = 1/2 OB
=> OB = 14 cm
Area of shaded region = Area of quadrant AQBO - Area of semicircle ODBO
=> (1/4 pi (14)^2 ) - ( 1/2 pi (7^2))
=> 1/2 ( 0.5 * 196 - 49 )
=> 1/2 ( 98 pi - 49 pi)
=> 1/2( 49 pi)
=> 77
Anonymous:
77cm^2 that is
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