Предмет: Геометрия, автор: galievanazerke259

Обьем прямоугольного параллелепипеда равен 60см2. Площадь одной его грани равна 12см². Найдите ребро параллелепипеда, этой грани. перпендикулярное​ Помогите плиз

Ответы

Автор ответа: Ailinon
0

Ответ:

Ребро параллелепипеда, перпендикулярное этой грани, равно 5 см

Объяснение:

Объём параллелепипеда равен V = a × b × c = 60 см²

Площадь грани равна = a × b

Оставшееся ребро с перпендикуларной грани с рёбрами а и b

Тогда c = V ÷ Sграни = 60 ÷ 12 = 5 см

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III. Read the third text and do the tasks.
Christmas in My Family.
Hello! My name is Alexander. I live in Ukraine. My family is large. I live with my parents and grandparents. I've got two elder sisters Olga and Anna. Now they are students of Kyiv University and they visit our place only on holidays and some family occasions. Each Ukrainian family has its own customs and traditions. Ours is not an exception. My parents are very sociable and friendly people, so from time to time our house is full of guests. Our favourite holidays are New Year, Christmas and Women's Day. My mother thinks that at night of New Year's Eve the old year with all its troubles leaves us forever and the New Year with all our hopes and expectations knocks at our doors. On the eve of January the 7' we start celebrating Christmas. It's a real ritual for ray grandparents. My granny always gets ready for this religious holiday beforehand. On Sviat Vechir we gather around the table for a holy supper of twelve symbolic dishes. We are not allowed to start supper until the first star appears in the sky. We begin our supper with the kutia (a dish of honey, poppy seeds and wheat kernels boiled in pure rainwater). There are no meat and meat products on our table. My granny is a wonderful cook, so we enjoy her varenyky, holubtsi and desserts made from dried fruit and honey. After tasty supper we go to bed. Early in the morning we go to church to take part in the church service. When we come back home we give each other presents and wish "Merry Christmas'". All boxes with the presents are located under Christmas tree. It's a nice time when my sisters are at home and we've got a lot of happy moments together.

4. Mark true or false.
1. Alexander has got two younger sisters.
2. His parents like communicating with people.
3. Their beloved holiday is Easter.
4. A holy supper contains twelve symbolic dishes.
5. The kutia is the main dish.
6. There are a lot of meat dishes on the table on Sviat Vechir.
7. The next day the family go to church.
8. All the presents are located in the wardrobe.
9. The sisters usually spend Christmas at home.
5. Answer the questions.
1. How many people are there in the boy's family?
2. Where do his sisters study?
3. What does the mother hope for in the new year?
5. What do the family do on Sviat Vechir?
6. What do the family do after the church service?
7. Why is Christmas beloved by the whole family?
7 лет назад