Fatimah17
Fatimah17
27-05-2018
Mathematics
contestada
I don’t know how to start this
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gmany
gmany
27-05-2018
Look at the picture.
The area of the shaded area is equal the area of the circle subtract from half the area of the rectangle.
[tex]A_1=\dfrac{1}{2}\cdot20\cdot10=100\\\\r=20:4=5\\\\A_2=\pi 5^2=25\pi[/tex]
[tex]A_F=A_1-A_2\to A_F=100-25\pi[/tex]
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