Плз составить предложения из слов: 1. party, every week, have, we. 2. every day, watch, we, tv. 3. likes, he, books. 4. once a week, have, they, english lessons. 5. the car, the police, stop. 6. reads, a lot, she. 7. have, we, dinner, usually at 2 o’clock. 8. they, foreign, languages, speak, three. 9. now, is, she, in the office. 10. a secretary, she, is.

треугольник, надо полагать?

треугольник с соотношением сторон 3: 4: 5 - прямоугольный - это общеизвестно, но можно и доказать с обратной теоремы пифагора.

площадь его равна 1/2 произведения катетов

108 - это 3+4+5 частей

1 часть=108/12=9

1 катет=3*9=27

2 катет=4*9=36

площадь = 1/2(36*27)=18*27= 486 см²

We have party every week we watch tv every day he likes books they have english lessons once a week the police stop the car she reads a lot we usually have dinner at 2 o cloock they speak three foreign languages she is in the office now she is a secretary

3+4+5=12

108/12=9 см на 1 часть

9*3=27

9*4=36

9*5=45

площадь по формуле герона : p=108/2=54

s=√54(54-27)(54-36)(54-45)=√54*27*18*9=486

dear liza. i don* t think i will do a lot on my holidays. i think i will prepare for my future exams. i should work hard and repeat and learn o lot of things. i hope i will go somewhere with my friends but only sometimes because they will be busy too. i can* t wait to see you again    because we haven*t seen each other for ages.

from russia with love, vika.