-
Из центра окружности О к хорде AB равной 30 см проведён перпендикуляр OC. Найдите длину перпендикуляра, если угол OAB=45
-
Предмет:
Геометрия -
Автор:
reaganl9cu - 5 лет назад
-
Ответы 1
-
угол OAB = 45
угол OCA = 90
сумма углов в треугольнике равна 180 следовательно угол AOC = 180 - 90 - 45 = 45
треугольник AOC равнобедренный значит AO=AC=15 см
-
Автор:
sabrina76 - 5 лет назад
-
0
-
-
Добавить свой ответ
Еще вопросы
-
Реши задачу с помощью уравнения. На день рождения гаухар пришло несколько мальчиков и 12 девочек .всего пришло 28 человек . Сколько мальчиков пришло к Гаухар?
-
Предмет:
Математика -
Автор:
stewart - 5 лет назад
-
Ответов:
2 -
Смотреть
-
-
Назовите одну общую осабенность насекомых, на данном рисунке.
-
Предмет:
Биология -
Автор:
teddy-bear - 5 лет назад
-
Ответов:
1 -
Смотреть
-
-
70 БАЛЛОВ ЗА СОКРАЩЕНИЕ ТОПИКА!!!
Сократить топик
Sport is very important in our life. It is popular among young and old people.
Many people do morning exercises, jog in the morning and train themselves in clubs, in different sections and take part in sport competitions.
Other people like sports too, but they only watch sports games, listen to sports news. They prefer reading interesting stories about sportsmen. But they don't go in for sports.
Physical training is an important subject at school. Boys and girls play volley-ball and basketball at the lessons. There is the sports ground near our school and schoolchildren go in for sports in the open air.
A lot of different competition are held at schools, a great number of pupils take part in them. All participants try to get good results and become winners. Sport helps people to keep in good health. If you go in for sports you have good health and don't catch cold.
Children and grown-ups must take care of their health and do morning exercises regularly.
There are some popular kinds of sports in our country: football, volley ball, hockey, gymnastics, skiing, skating. Athletics is one of the most popular kinds of sports. It includes such kinds of sports as: running, jumping and others. Everybody may choose the sport he (or she) is interested in.
There are summer and winter sports.
My favourite sport is swimming. I go to the swimming-pool twice a week, but I prefer to rest by the lake or the river and swim there. My friend Kostya goes in for boxing. He is a good boxer and he is a brave and courageous boy. His hobby helps him in his every day life.-
Предмет:
Английский язык -
Автор:
korbinwvi3 - 5 лет назад
-
Ответов:
1 -
Смотреть
-
-
решите пожалуйста два уравнения
[tex]1 )| |y| - 8 \frac{1}{5} | = 2.3[/tex]
[tex]2) |a - 5| \div ( - 2\frac{14}{19}) = - \frac{57}{104} [/tex]
-
Предмет:
Математика -
Автор:
inocencio2jyg - 5 лет назад
-
Ответов:
1 -
Смотреть
-
Топ пользователей
-
Fedoseewa27
35894 -
Askold
2792 -
Pikachu
2224 -
hobbesbowers
2116 -
kaylynnbarron676
1818 -
女fei
1240 -
yulia-kaplina
1156 -
Poinntt
946 -
Bars
930 -
Queenmagic18
754
How much to ban the user?
1 hour
1 day
100 years