fatcousin
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√(a×b) = height at split on semicircle · same area as a×b rectangle · runs locally
⊞
a
4
b
9
√(a×b) = geometric mean of a and b = 6.0000 · arithmetic mean = (a+b)/2 = 6.5 · AM ≥ GM always · square root = side of a square with area = rectangle area
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