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Длина отрезка АВ равна 37 см. Точки С и лежат на отоезке АВ,причём точка D лежит между точками С и В. Найдите длину отрезка СD, если: а) АС=12см, DB=17cm; б) АD=26см, СВ=18см
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Предмет:
Математика -
Автор:
milo77hz - 6 лет назад
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Ответы 1
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я думаю что так-12+17+26+18=73см отрезак АВ
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Автор:
lillianna - 6 лет назад
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помогите пожалуйста вот текст Many Russian people have a plot of land out in the country called a “dacha”. They often have a small house there where they can relax or grow fruit and vegetables in the garden.
Dachas are usually a few kilometers outside the city. So Friday evening and Saturday morning thousands of cars, buses and local trains carry millions of people to their dachas outside the city. People carry bags, backpacks and small carts with what they need for a relaxing weekend at the dacha. You can often see cats and dogs in the cars as people usually take their pets with them.
People spend their weekends at their dachas during the spring, summer and autumn. During the spring people clear the garden. Many people plants vegetables such as cucumbers, tomatoes, onions and potatoes while others prefer to grow flowers. In the summer, families swim and fish in nearby lakes and rivers. They also pick fruit and berries which they use to make jam. Autumn is the most beautiful season on the dacha. All of the trees, grass and plants are green, red and yellow and there are a lot of colourful flowers.
During the long, cold Russian winters, people can't wait to return to their dachas. There they can relax and get away from and the busy city life.-
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ДАЮ 50 БАЛЛОВ!!!
На сторонах AB и AD ромба ABCD отложены равные отрезки AE и AF соответственно. Докажите, что угол CEF=углу CFE.
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