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Bulgaria MO, 1999, Problem 2

На картинке два подобных треугольника. O и H — центр описанной окружности и ортоцентр маленького, H' — ортоцентр большого. Докажите, что OH=OH'.



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Bulgaria MO, 1999, Problem 2

На картинке два подобных треугольника. O и H — центр описанной окружности и ортоцентр маленького, H' — ортоцентр большого. Докажите, что OH=OH'.

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