Предмет: Математика, автор: KamillaCool21

Найдите значение неизвестного угла (4 балла)



а) Найти градусную меру угла ДОТ б)Найти :? Угол ( неизвестный)
СРОЧНО НАДО!
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Автор ответа: liskeliza
4

Ответ:

Вот, правильно

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Some creatures have built-in compasses.

Imagine that you are sitting in a canoe on a dark and cloudy night in the middle of a big lake. You are completely lost. You have no idea of which way to paddle or where you might get by paddling in any one direction.

While you are worrying about what you might do, think about the many other creatures that would have no problem at all. A long list of animals as different as birds, bees, fish, turtles, and whales would know right off what direction would take them home.

For more than twenty years scientists have been seeking to understand the mystery of this “sixth sense” of direction. By trying out ideas and solving problems one by one, they are now getting close to an answer.

One idea that is fun to think about is that animals might have a built-in compass. Our Earth is itself a big magnet. So a little magnetic needle that swings freely will line itself up with the big Earth magnet to point north and south.

When people discovered that idea about a thousand years ago and invented the compass, it became a new high-tech gadget. It allowed sailors to navigate on ocean voyages, even out of sight of land and under cloudy skies.

Birds Find Their Way

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Some of them fly for thousands of miles and mostly at night. Experiments have shown that some birds can recognize star patterns. But they can keep on course even under cloudy skies. How can they do that?

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