Предмет: Математика, автор: snezhanapupova

дострой фигуру до прямоугольникаплощадь которого равна 12кв,см

Ответы

Автор ответа: seremelnik
0
. Два равносторонних треугольника составляют квадрат, при этом площадь квадрата будет равна 2 площади треугольника - 2*12  - 24 см кв. Сторона такого квадрата - корень кв из 24 = прибл.4,9.Нарисуйте половину такого квадрата, прерываемого по диагонали - получится равносторонний треугольник площадью 12 кв см. 2. Для младших классов подойдет любая фигура, составленная из квадратов пл 1 кв см, состоящая из 12 таких квадратов- квадрат со стороной 4 см- 5 кв сверху, 7 кв снизу, соединенных в единую фигуру,- Т-образное распределение этих квадратов, напр. 6 на 6, 4 на 8 и т.д.- Г-образное их расположение в любой пропорции, лишь бы число маленьких квадратов было равно  12.
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Choose the correct answer.
1. My sister is six years than me.
a. old b. older c. as old as d. the oldest
2. She_ for dinner this evening. We invited her last week.
a. came b. comes c. is coming d. will come
3. He never_ hats. He doesn't like them.
a. will wear b. wear c. wore d. wears
4. She can speak French__ she can't write it.
a as a result b. soc. but d, in addition
5. We lived in England - three years.
a for b. since c. ago di in
6._ we got home, children were listening to music.
a. On b. For c. When d. Since
7. In 1987 |__ school and started work.
a. leaved b. lift c. lifted d. left
8. _ car did you drive? ---
a. Who ... herb. Whose ... hers c. Which ... her d. What ... hers
9. There any sugar. I can't bake a cake.
a. aren't b. isn't c. weren't di haven't
10. The milk isn't warm . I can't drink it cold.
a. too b . very c. enough d. so
11. There aren't - apples in the fridge.
a. a lot b. much c. a little d. many
12. I'll buy paper when I go shopping.
a. any b. much C. some d. many
13. How _ countries have you visited? --- Twenty-three.
a much b. many C. often d. few
14. Look! The sky is cloudy. It _ rain.
a. will b. used to c. has to d. is going to
15. She hasn't got a CD player. - Oh!/ her one.
a. am going to buy b. am buying C. will buy d. buy
16. The Queen's _ woman in the world.
a richer b. the most rich c. the richest d. richest
17. I met the man works in a bank.
a who b. which c. that d. where
18. I bought the coat was in the shop window.
a who b. where C. whichd. why