Предмет: Геометрия, автор: serfer141

Задача по геометрии . Очень много балов , не пропустите !!!!

Найдите объем конуса, если его осевым сечением является прямоугольный треугольник , катет которого равен 10 см .

Ответы

Автор ответа: estern
0
Образующая конуса имеет длину 10 см, а угол раскрыва конуса прямой. Стало быть высота конуса будет 10/корень(2), радиус также 10/корень(2) (катеты прямоугольного равнобедренного треугольника с гипотенузой 10 см). Объем конуса: (3.14/3)*(10/корень(2))*100/2 = 370 см3
Автор ответа: serfer141
0
А как все это можно записать ? Помогите . С меня 10 баллов , как лучший ответ .
Похожие вопросы
Предмет: Алгебра, автор: knazival
Предмет: Английский язык, автор: katrinkatro
Read the text "Safety in the streets".
Make sure you’re safe and sound when you’re out and about.

The chances of you becoming a victim of crime when out of the house are low. However, you should still take your personal safety seriously.

Mobile phone safety.

Mobiles are great for staying in touch but they could also attract thieves.

1) Be aware of your surroundings. Don’t use your mobile if you think it might be stolen.
2) You should keep your mobile hidden when out and about.

When using public transport.

It is important to stay safe when you’re travelling.

1) At a bus or railway station, it’s better to wait in a busy area.
2) On an empty bus, you should sit near the driver.
3) If you have to be out at night, plan in advance how you will get home. Don’t leave it to chance. Try to travel with friends or ask your parents to come and give you a lift home.

In public places.

Thieves are attracted to any high-tech gadgets you have on you.

1) MP3 players are the latest in mobile technology but think twice about using them in public. Headphones could tempt thieves.
2) Wearing headphones can also prevent you from hearing oncoming traffic or someone approaching from behind.
3) Keep bags closed and money and valuables out of sight.
Write true, false, doesn’t say:

1. The writer says that the chances of becoming a victim of crime when out of the house are low.



2. At a bus or railway station, it’s better to wait in an empty area.



3. The writer doesn’t think that thieves are attracted to any high-tech gadgets you have on you.
Предмет: Математика, автор: Янка777555