Предмет: Математика, автор: ula44519

Дан равнобедренный ∆АВС, АВ=АС=20см, ВС=24см. Биссектриса АК=16см. Найдите периметр ∆АВК.

Ответы

Автор ответа: Akino865

P=48см

В равнобедренном треугольнике биссектриса является и высокой и медианой.

Она делит сторону BC пополам, получается 12 см. 12+20+16=48.

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Education is the main people's wealth and lots of them consider it the sense of living. They get education from early childhood and learn until their hair is grey. Education plays an important role in people's lives, that's why great attention is paid to it.
School is one of the most significant institutions. School teaches reading, writing, the use of mathematics and other basic skills needed in everyday life. It increases people's knowledge of the world and themselves, and helps them understand the rapid changes that take place in modern society. At school students learn their responsibilities and rights as citizens, improve their ability to think critically, and develop such basic values as truth, justice and equality.
People throughout the world attend schools, but the quality of schools varies among countries. Today most countries have well-developed educational systems, guarantee its citizens the right to have secondary education, and create means for further professional education. Different countries try to preserve the democratic character of education paying much attention to common human values, developing independent critical thinking instead of simple perception of information.
Schools face some problems, however. The greatest problem for a school today seem to be that all subjects are compulsory and students have no opportunity to choose the subjects they want to learn deep. Thousands of students have to spend a lot of time sitting and thinking over the subjects they don't like, don't need or don't understand. It usually drives them mad and they start hating this or that subject or become indifferent to it. It would be great if some subjects were optional so that children could choose their favourite ones out of the formal curriculum. Such education would be better and more effective.

Which of the following statements is false?
Schools can be different in the different parts of the world
At school you don’t develop basic values
At school students don’t learn how to fight
How to become non-significant

Which of the following statements is true?
Students can choose what to study
Most people think that education is important
Old people can’t learn
All countries have well-developed educational systems

Choose the best name for this text.
Smart people
Education for senior people
The role of school in people’s life
Favourite school subject

Why are some people not interested studying?
They have other things to do
They don’t have textbooks
They study the subjects they don’t like
They don’t have enough sleep

At schools students often don’t…
learn how to become a responsible citizen
learn how to write
develop basic values
have the opportunity to choose what to learn