r² = (r-1)²+(r-2)²
Where r is the radius of the circle.
r² = r²-2r+1+r²-4r+4
r²-6r+5 = 0
r²-r-5r+5 = 0
r(r-1)-5(r-1) = 0
Therefore;
r ≠ 1 unit.
r = 5 units.
r-1
5-1= 4 units.
Where 4 units is half the side length of the square.
It implies;
Square side length is;
4*2 = 8 units.
Area Red Square is;
8²
= 64 square units.
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