Предмет: Геометрия, автор: nekit94

В треугольнике ABC угол С= 90, CH высота , AC=25, AH=24. Найдите cosB

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Автор ответа: ужнеужели

Два разных решения в скане. Выбирайте!

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Summerhill Scool
What will you do if your teacher says you can have a lesson or do home? In fact, in Summerhill School teachers really do it. Summerhill is the oldest children’s democracy in the world. It is, maybe, the most famous ‘free’ school.
This school in Suffolk (the United Kingdom) is a very special place. Trees and grass, meadows and playing fields give children a good chance to play as much as they want. They also do a lot of project work.
A man called A. S. Neill opened this school in 1921. Neill knew well what kinds of problems many children have at school and he believed he could help them feel free. So each child there can choose what he wants in life. The children at Summerhill decide themselves if they want to have lessons or not. It is strange, but most of them do. They often come from schools at which they were unhappy and didn’t want to do any work at all. But at Summerhill they usually decide that to have classes is more interesting than not to have them.
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Another unusual thing about Summerhill is the meetings. There teachers and students discuss the school rules two times a week. If a teacher wants to tell everyone about a student’s bad behaviour, he can do it at the meeting. A student can also say what he dislike about a teacher. At the meetings children can listen, think and make decisions about their own lives.
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