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MathNet 2017-part-07 — 172 problems (EN–VI) Question 137

Math Olympiad Vault · MathNet 2017-part-07 — 172 problems (EN–VI)

Question 137

In unit square $ABCD$, points $E, F, G$ are chosen on side $BC, CD, DA$ respectively such that $AE$ is perpendicular to $EF$ and $EF$ is perpendicular to $FG$. Given that $GA=\frac{404}{1331}$, find all possible values of the length of $BE$.