Предмет: Математика, автор: dimama8989

В правильной четырехугольной пирамиде SABCD точка О-центр основания,S-вершина,SC=15.AC=18. Найти Длину отрезка SO

Ответы

Автор ответа: ВВБ86

OC = 9
SO^2 = 15^2 - 9^2 = 225 - 81 = 144
SO = 12
Ответ: 12

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Биология, автор: sashalichachenko

помогите пожалуйста с задачами
СРОЧНО ПОЖАЛУЙСТА!!!!!!!

6 лет назад

Предмет: Физика, автор: lizamikulko2

в сосуд налили 250 см кубических керосина. Рассчитайте на сколько увеличится масса сосуда?

6 лет назад

Предмет: Английский язык, автор: kclfjn

Помогите пожалуйста с английским
Что надо куда вставить?
Tradition, relatives, decorating, improved, striking, midnight, see in, fireworks, luck, customs

The New Year is a very popular holiday in Belarus. Most people start 1) _________ their houses and New Year Trees a week before the holiday. On New Year's Eve, 31 December, people stay up until 2) ________ to 3) _________ the New Year with their family and friends. When the clock is 4) __________, people are thinking of their wishes (желания) for the coming year. This is one of the 5) ___________ we follow. Then we wish each other happiness and good 6) __________.

These days a lot of people start group chats on smart phones to wish each other a Happy New Year. Life has really 7) _________ with these little smart things. We can see the 8) ________, who are far away, on Skype! Aren't we lucky!

And there are a lot of people who organise 9) ________ displays. The dark night is illuminated by thousands of beautiful colours. It's a great 10) _________!

Text 2. The UK

Good luck, join hands, Eve, fireworks, a public holiday, Trafalgar Square, to strike, celebrate, pubs, First Footing

New Year’s 1) _______ – 31st December – is a time for the British to eat, drink and party when they 2) ________ the beginning of a new year. Many people go to 3) _________ in London, or a street party in their city. Others visit friends or go to 4) __________ and restaurants, which are very crowded on that night.

There is a great atmosphere when everyone waits for Big Ben 5) ________ midnight. Then people kiss and 6) _________ to sing the traditional Scottish song Auld Lang Syne. Many people also light 7) _________ at midnight.

The main tradition is 8) _________. This means that the first person to come into your house after midnight should be a tall dark-haired man. He should bring a piece of coal, some bread, salt or a bottle of whiskey to bring 9) _________ to the family.

A lot of people also make New Year’s Resolutions: they promise to do things like stop smoking or ‘do more exercise’ in the New Year. January 1st (and 2nd in Scotland) is 10) __________ so that people can recover from their celebrations.

6 лет назад

Предмет: Математика, автор: 1231641

растояние от села до города 15 км,Агроному нало попасть из села в город, На сколько времени раньше он приедит в город на велосипеде со скоростью 250 м мин ,чем пойдет пешком со скоростью 120м/ мин

10 лет назад

Предмет: География, автор: Маматвоя

Помогите
Описание страны Ирак)
По плану 7 класса с 3 по 7)
Срочно

10 лет назад