Предмет: Математика, автор: pargevick8873

периметр квадрата равен 8 см. Найти периметр квадрата, составленного из двух таких квадратов составили прямоугольник Найди площадь и

Ответы

Автор ответа: dkuryshev

1) 8:4=2(см)-одна сторона квадрата.

2) 2*2=4(см)-площадь одного квадрата.

3) (4+4)+(4+4)+(4+4)=24(см)-периметр прямоугольника.

4) 8*4=32(см2)-площадь прямоугольника.

Ответ: периметр прямоугольника-24 см,площадь прямоугольника-32 см.

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Computer is one of the inventions of the 20th century that changed the
world greatly. The first computers of the 1940s were enormous. But now
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Computers are found everywhere and used in every sphere of life. In а
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Computers also have some disadvantages. There is а famous joke that
computers are designed to solve problems but half of the time they are the
problem. As computer is а complicated device, one small breakage may
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Besides, there is а problem of compatibility. First of all, there are
hardware devices which can't work with the old operating systems, such as
а processor, а hard disk drive, а video card, etc. Then, there are programs
which need more resources than computer actually lшs.
Thirdly, computers become more and more complicated, and much
effort is required to learn how to work with them. Fourthly, computer
viruses cause а lot of trouЬle - they can spoil, remove or steal computer
data, and every user knows it well from his experience.
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their free time chatting with friends on the Internet and doing practically
nothing. This aspect can't bе denied.
То crown it all, computer is а good device like many others, designed
to help people. But it's our own free will that lets us use it in order not to
waste time but to get best results.

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2. Were there many computers in the middle of the 20th century? Why
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