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вычеслите обьем правильной треугольной призмы ,сторона основания которой равна 20 см. а высота-9 см.
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Предмет:
Математика -
Автор:
luke1zbn - 5 лет назад
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Ответы 1
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Объем фигуры V=soc*hплощадь основания soc=√3*а²/4следовательно V=√3*a²/4*h=√3*20²/4*9=900√3
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Автор:
dakota70 - 5 лет назад
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0
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Решите графически систему уравнений
y=3x
4x-y=3
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1. Read the text and mark the sentences after it as true (T), false (F), or not
stated (NS).
Jackson Hole
Jackson Hole is a beautiful valley situated in the state of Wyoming,
USA. The place got its name from David Jackson, a traveler and a hunter,
who once lived there. His friends called it Jackson Hole because it really
looked like a hole in the middle of the mountains.
Jackson Hole is a popular holiday place. In summer month, people go
there to walk in the mountains, ride horses, go fishing and boating on the
rivers and lakes. Many visitors cross the valley in boats on the Snake River.
It turns from side to side, like a snake. The water in the river moves very fast
and you have to be brave to travel on it.
Jackson Hole still keeps its Old West traditions. There are shops with
cowboy hats and boots and cafes which look like saloons of the American
West. Holidaymakers can ride horses or go to a rodeo to see traditional
competitions. The rodeo usually begins with a parade of cowboys and
horses. Then comes the competition. Riders try to stay on a wild animal for
eight seconds. They also ride wild horses and large bulls. The animals try to
throw the cowboys to the ground. The riders try not to fall off. Another thing
that cowboys do is throwing a rope around a young cow’s legs. The cowboy
who does this in the shortest time wins.
People come to Jackson Hole from all over the world to enjoy the best
of cowboy and mountain culture.
1) It was David Jackson who gave the valley its names.
2) There are a lot of things people can enjoy doing in Jackson Hole.
3) The Snake River is the longest in Wyoming.
4) It is easy to sail along the Snake River.
5) Horses help people to win a rodeo.
6) Visitors from abroad come to Jackson Hole for holiday.
Use the words and complete the sentences.
Border, chain, coast, flow, lily-of-the-valley, perfect, Plains, stretch,
valley, flowed.
1) The … is a beautiful spring flower. 2) Masha spent her holidays on
the Black Sea … . 3) Does the Mississippi, the longest river in the USA, …
south? 4) The Urals is a famous … of mountains in Russia. 5) What
countries does Russia … on? 6) Does the forest … to the East or to the
west from this place? 7) Sunday was such a … day for our boat trip. 8) The
Great … of the USA are situated in the central part of the country. 9) There
is a fantastic … high in the mountains. 10) The waters of the river …
slowly and it was easy to swim in it.
4. Match the place names with their descriptions.
1) Asia a) the continent where Italy, Spain, France and
2) Texas Germany are situated
3) California b) the capital of the USA
4) The Potomac River c) the American state where Hollywood is situated
5) Europe d) one of the biggest states in the USA in the south
6) New York of the country
7) Washington, D.C. e) the name of the continent and at the same time
8) Australia of the country
9) The Mississippi f) the continent where India is situated
10) The USA g) the country which has got fifty states
11) The New World h) the city people call “the Big Apple”
i) the longest river of the USA
j) the river on which Washington, D.C. is situated
k) North, Central and South America
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Предмет:
Английский язык -
Автор:
stellalkvf - 5 лет назад
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Ответов:
2 -
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Возможны ли обмороки при недостатке белка? Является ли это внешним признаком?
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Предмет:
Биология -
Автор:
sourdoughuuor - 5 лет назад
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Ответов:
2 -
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- ПОДРОБНО !!!!Через вершину В квадрата ABCD проведена Прямая BH перпендикулярна к его плоскости. Найдите длину отрезка BH если наклонная HC=8см а сторона AB=6см
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