Find Area of Shaded Region

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you have a rectangle with sides:
the length =20
half circle has diameter 20, =>r=10
the width=10


the area of shaded region is:

the area of rectangle - the area of half circle

the area of shaded region =20*10-(10)^2*pi/2=200-50*pi
approximately:42.92 square units
 
you have a rectangle with sides:
the length =20
half circle has diameter 20, =>r=10
the width=10


the area of shaded region is:

the area of rectangle - the area of half circle

the area of shaded region =20*10-(10)^2*pi/2=200-50*pi
approximately:42.92 square units

Very cool. I like shaded region geometry problems.
 

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