Вопрос школьника по предмету Математика
даны две параллельные плоскости а и в.точки а и в принадлежат плоскости а.точки с и д плоскости в.отрезки ад и вс пересекаются в точке м.ав-10см вм-6 см см-12 см.найти длину отрезка сд
Ответ учителя по предмету Математика
Применены : теорема о пересечении двух параллельных плоскостей третьей плоскостью, свойство накрест лежащих углов при параллельных прямых, свойство вертикальных углов, признак подобия треугольников по двум углам, пропорциональность сходственных сторон
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Одинаковые буквы-это одинаковые цифры,разные буквы-разные цифры.
a) cheap accommodation b) voluntary c) cast a glance d) rebel e) dedicate 0 willing participants g) notorious h) provide i) absolute obedience j) tramping k) rebelled l) refer m) spread n) cast-off clothes o) adult life
I. She put on a red hat and_____at the mirror.
2.________to the dictionary when you don’t know how to spell a word.
3. Harry had to wear his cousin’s______
4. Jessica_______against her parents’ plans and dropped out of school at the age of 16.
5. She spent most of her_____working as a guide in Australia.
6. There’s a shortage of_____in the area.
7. The company is_____for paying its bills late.
8. He demands_____from his soldiers.
9. The doctor wants to_____his life to curing the sick people in this war-torn country.
10. The government will_____poor families with social services.
11. He was one of the_____in this environmental project.
12. We didn’t expect that the peacock would_____its tail.
13. She does_____work for the Red Cross two days a week.
14. We spent a week_____the streets of Boston, looking for suitable accommodation.
15. He was a bit of a_____when he was a teenager and dyed his hair pink.