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MathNet 2004 — Part 01 Question 68

Math Olympiad Vault · MathNet 2004 — Part 01

Question 68

In triangle $ABC$ with orthocenter $H$ one has that
$$
AH \cdot BH \cdot CH = 3 \text{ and } AH^2 + BH^2 + CH^2 = 7
$$
Find:

a) the circumradius of $\triangle ABC$;

b) the sides of $\triangle ABC$ with maximum possible area.