На рисунке точка О-центр окружности ,а точка А,В,С лежит на окружности . Найти угол АСВ,если - №32456271

На рисунке точка О-центр окружности ,а точка А,В,С лежит на окружности . Найти угол АСВ,если угол АОВ=40°.помогите.
- Предмет:
  Геометрия
- Автор:
  grahammcdaniel
- 6 лет назад

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| Прочитайте текот. Законите предложения , ныбрав правильный парна ответа,
The Bald engle) To mobor
In 1782, soon after the United States won its independence, the bald eagle ( F u
open) was chosen as the national bird of the new country, American lenders wanted the eagle to
eagle because it was found all over North America,
be a symbol of their country because it is a bird of strength and courage, They chose the bald
Today the bald eagle has almost disappeared from the country. In 1972, there were only
3,000 bald eagles in the whole United States. The reason for the bird's decreasing population is
pollution, especially pollution of the rivers by pesticides. Pesticides are chemicals used to kill
insects and other animals that attack and destroy crops (ocesb). Unfortunately, rain often
washes pesticides into rivers. Pesticides pollute the rivers and poison (orpassato) the fish
Eagles eat these fish and then the eggs eagles lay are not healthy. The eggs have very thin shells
more eagles, the number of eagles quickly became smaller,
and do not hatch (He Bbudymui Baiorca), Because many of the eggs did not hatch and produce
Nowadays the American government and the American people are trying to protect the hald
eagle. The number of bald eagles is slowly increasing. It's clear that the American national bird
will survive
a) it's a clever bird,
1. American leaders have chosen the eagle as a symbol of the country because
b) it's a brave bird,
c) it's an independent bird,
d) it's a beautiful bird,
2. In the eighteenth century people could see bald eagles
a) everywhere in North America,
b) nowhere in North America.
C) somewhere in North America.
d) all over the American continent,
3. People used pesticides to
a) destroy the crops,
b) poison water
C) protect plants.
d) ruin nature,
4. The eagles' shells became thin and didn't hatch because
a) eagles drank poisonous water
b) eagles ate poisonous fish,
c) eagles ate poisonous insects,
d) cagles ate poisonous birds
5. It was necessary to protect bald eagles because
a) they were unique
b) they were disappearing,
c) they were ill.
d) They couldn't eat fish
ІІ Выберите правильный вариант ответа.
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m(Ca(OH)2)-?
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