最近做了些IMO的考古題~
不過再來可能要到下禮拜才會繼續了~
先準備拿力學競賽的金牌吧~ ^^
(IMO 1959)
4. Construct a right triangle with given hypotenuse such that the median drawn to the hypotenuse is the geometric mean of the two legs of the triangle.
5. An arbitrary point is selected in the interior of the segment . The square and are constructed on the same side of , with segments and as their respective bases. The circles circumscribed about these squares, with centers and , intersect at and also at another point . Let denote the point of intersection of the straight lines and .
a) Prove that and coincide;
b) Prove that the straight lines pass through a fixed point independent of the choice of ;
c) Find the locus of the midpoints of the segments as varies between and .
※懶得翻譯了~ XDD
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