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Lin's Octagon

Author: mathforces
Problem has been solved: 45 times

Русский язык | English Language

Lin randomly selected three different vertices of some regular octagon. Let the irreducible fraction $ \frac{n}{m} $ be the probability that some of the sides of the formed triangle coincides with some side of the original octagon. Find the value of $ | n + m | $.

Lin's Octagon

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