Question 1204821
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Hint:
{{{
drawing(400,500,-5,5,-5,5,
graph(400,500,-5,5,-5,5,-100),
blue(
line(-1,-2,-1,0),
line(-1,0,1,0),
line(1,0,1,-2),
line(1,-2,-1,-2)
),

green(circle(0,0,1))
)
}}}


Another hint
Find the area of the square and the area of the lower semi-circle.
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