Предмет: Алгебра, автор: denis79

Начерти пятиугольник ABCDE и проведи прямую l так ,чтобы она разбила пятиугольник а) на треугольник и шестиугольник; б) на треугольник пятиугольник; в) на четырехугольник и пятиугольник; г) на два четырехугольника.

Ответы

Автор ответа: shuriki83
0

а) начерти произвольный пятиугольник ABCDE на стороне BC и наCD отметь точки и соедини их; б)  от точки E выведи луч на сторону AB;  в)на сторонах BC и  DE отметь точки и соедини их;  г) с точки B выведи луч на сторону DE

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1. А. Прочитайте текст и постарайтесь догадаться о значении выделенных слов.

Computers are now essential in many areas of life — modem

banking, information technology and many others. However, this

is not true for education.

There are some subjects which may be better taught using computers. Elementary mathematics, elementary language learning,

any subject that requires a student to memorize basic facts through

repetition (повторение) is good to computer learning. The computer can be programmed to provide an endless number of simple

questions, and as the student answers these questions the facts are

learned.

However, in the learning and practice of more complex ideas,

the computer is not adequate. A computer can evaluate (оценить)

an answer as right or wrong, but it cannot determine why. It cannot

find out why a student is making mistakes, and then explain important concepts in a different way so the student will understand. Task

connected with explanation cannot be taught by computers as there

are too many variables for a computer to deal with successfully.

Thus, while computers may be useful for practising simple

skills, they are not an essential feature of modern education. Until

further developments in computers are made, the human teacher

will remain indispensable.

B. Подберите к каждому слову или словосочетанию в колонке А соответствующее из колонки В.

А В

1. essential а. thing that can vary

2. area of life b. idea, opinion

3. memorize с absolutely necessary

4. adequate d. most important

5. concept e. sphere of activity

6. variable f. learn by heart

7. indispensable g. satisfactory, sufficient

С Заполните пропуски антонимами и синонимами.

right ... ... new, up-to-date

... complex most important ...

adequate ... ... absolutely necessary