Вычислить (0.17)^2 +2*0.17*0.13+(0.13)^2

Помогите доказать что AB параллельно CD

употребите глаголы ,данные в скобках ,в форме Past Continuous:          

 1)when you telephoned ,I (have) dinner.

2)the baby (sleep)soundly when I went to wake him.

3)she (talk) with Mr.Smith when I saw her in the South.

4)the accident happened while they (travel) in the South.

5)when I got up this morning ,the sun (shine) brightly.

6)at seven o'clock,when you telephoned ,I (read) the newspaper.

7)mary (play)the piano when I arrived

8)helen fell just as she (get)off the bus.

9)the wind (blow) hard when I came to work this morning

выберите правильную форму глагола .                                                

    1)As I (do)the washing-up,I (break)a glass.

2)we (walk) in the woods when the storm (begin).

3)simon (dance)when he (fall)and (break)his leg.

4)debbie (sing)in the scholl choir many years ago.

5)Why (you\laugh)all through you history lesson yesterday?

6)I (play)the piano ,but I (not\play)very well.

7)I have a car but I (not\use)it very often..