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6. Угол между перпендикулярами
Author:
Алексей Сгибнев
Topic:
Geometry
6. В вершине угла, равного 70˚, восстановлены лучи, перпендикулярные к его сторонам, как показано на рисунке. Найдите угол между этими перпендикулярами.
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