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El área sombreada será la resta de el área del semicírculo mayor menos el área del semicírculo menor:
AS = π*8²/2 - π*(8-3)²/2
AS = π*64/2 - π*(5)²/2
AS = π*32 - π*25/2
AS = π*32 - π*12.5
AS = 19.5*π
AS = (39/2)*π = 61.26
AS = π*8²/2 - π*(8-3)²/2
AS = π*64/2 - π*(5)²/2
AS = π*32 - π*25/2
AS = π*32 - π*12.5
AS = 19.5*π
AS = (39/2)*π = 61.26
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