1.Составить во к следующим ответам.
1. I am doing my homework now.
2. They usually do their homework in the evening
3. My mother went shopping last Friday.
4. My friends have been in Italy 2 years ago.
2. Используйте глаголы в скобках в правильной форме.
1. I (has written, wrote, have written)
the letter yesterday.
2. Tamara (has, have) already (cleans, cleaned) the room.
3. I (have done, is doing, am doing) my lessons now.
4. He (has done, have done, did) his exercises till six o’clock.
Объяснение:
1.Составить во к следующим ответам.
1. I am doing my homework now.
2. They usually do their homework in the evening
3. My mother went shopping last Friday.
4. My friends have been in Italy 2 years ago.
2. Используйте глаголы в скобках в правильной форме.
1. I (has written, wrote, have written)
the letter yesterday.
2. Tamara (has, have) already (cleans, cleaned) the room.
3. I (have done, is doing, am doing) my lessons now.
4. He (has done, have done, did) his exercises till six o’clock.
рассмотрим ΔАСО И ΔВДО:∠САО=∠ДВО-- по условию
АО=ВО-- ПО УСЛОВИЮ и ∠АОС=∠ВОД-- КАК ВЕРТИКАЛЬНЫЕ
ΔАСО=ΔВДО ПО 2-му признаку равенства Δ-ов.
(чертеж сам-но) ДАНО: АВ∩СД=О
АО=ВО, ∠САО=∠ДВО
доказать: ΔАСО=ΔВДО.