المساحة GRAY AREA = ???

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R=(16/3*4)/(4+16/3+20/3)=4/3

المساحة=16/9π

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r^2+(r+1)^2=(r-1)^2+(4-r)^2 12r=16

>r=16/12=(4/3)m

 S(GRAY)=Π*(4/3)^2

=16Π/9m^2🍀❤🌹🌼🌸🌺

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