Suppose large rectangle is x wide, y high.
Black area * 2= 3x+4y+(x-4)(y-3) = xy+12=112+12=124
green area = 112-124/2=112-62=50
Suppose large rectangle is x wide, y high.
Black area * 2= 3x+4y+(x-4)(y-3) = xy+12=112+12=124
green area = 112-124/2=112-62=50
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