Предмет: Геометрия, автор: shimpermansanelya7

1 в прямоугольнике АВСД точка О является точкой пересечения диагоналей АС=12см,а периметр треугольника АОД равен 25см .Найдите длину стороны АД

Ответы

Автор ответа: mirzabekdi24

2

Ответ:

13 см. Ответ:С

Объяснение:

т.к в прямоугольнике диагонали равны,то АС=DВ=12см,то и АО=ОС=DО=ОВ=(12:2=6см)

Р∆АОD=25см,DA=25-(6•2)=13см.

Ответ:С

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: FreeZinC

Пожалуйста помогите!!!©¶°4N°

1 год назад

Предмет: Русский язык, автор: Аноним

Упр 322 помогите пожалуйста

1 год назад

Предмет: Окружающий мир, автор: пригл

нородное ополочение - это

1 год назад

Предмет: Английский язык, автор: karnauhovarturpa7w6p

переведите пожалуйста следующий текст.
Russia
[1] The total area of Russia is a little more than 17 million square
kilometres. The population is about 150 million people. The capital of Russia is
Moscow. The greater part of the territory of Russia is vast plains with low
mountain ranges and long rivers. The Urals divide Russia into the European and
Asian parts.
[2] The Volga and the Ural are the longest rivers in the European part of
the country. The longest rivers in the Asian part are the Ob, the Yenisei and the
Lena which flow into the Arctic Ocean. The world's largest inland sea is the
Caspian. Lake Baikal is the world's deepest lake. Our country is very rich in
39
mineral resources; especially it is rich in gas, oil and forests which are exported
to different countries on a large scale.
[3] As Russia is a very large country, its climate is very different.
However, we can say that it is mainly continental. The Arctic Ocean influences
the weather on a great territory of the country. In some parts of our country
winter lasts as long as six months. The European part of Russia is in the
temperate zone with warm or hot summers and rather mild winters.
[4] From an agricultural country our country has become a highly
developed industrial and agricultural state. Heavy industry has been created.
There have appeared such new branches of industry as aviation, machinebuilding,
chemical, automobile and many others. A number of hydroelectric
power stations have been constructed as well.
[5] It is to be noted that the first atomic power station in the world began
operating in Obninsk near Moscow in 1954; the first atomic ice-breaker in the
world was also built in Russia. For a number of years our country played a
leading role in the field of space exploration. In 1957, the first artificial satellite
in the world was launched in Russia. The first space flight was carried out by
Yury Gagarin in 1961.

7 лет назад

Предмет: Литература, автор: galikeevaaigul

1. сколько лет было героине Лизе из повести Н.М. Карамзина "Бедная лиза"?
2. Где чаще всего проходили свидания Лизы и Эраста?

7 лет назад