Lemma 2: Suppose a u0 x v0 rectangle Ķ is given with ^ = c and 1 < c < -?=. Let T = AABC denote the equilateral triangle with side 1 and <3l = {R : Ris similar to/?) andT c i?}. Then for any R e % if R isn't a circumscribed rectangle of T, then there must exist a smaller rectangle /? e 91 that contains T.
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