В прямоугольнике ABCD BE 1 АС, АЕ : ЕС = 1:3. Найдите углы, которые составляет со сторонами прямоугольника его диагональ. в

Each person has not only the right. but also duties. What are the responsibilities of the student have? First of all, each student is required to attend school. In high school student must behave well at recess