Найти площадь круга, вписанного в правильный треугольник, со стороной 2√3

1. Выберите правильный вариант. 1. Did you see / have you seen my book anywhere? I can’t find it. 2. I have done / did my homework. Now I can go for a walk. 3. We didn’t play / haven’t played football yesterday. 4. Someone has eaten / ate all the cakes. I’ll buy some more. 5. Children have visited / visited their Granny three days ago. 6. When did you help / have you helped your parents about the house?

просклонять слово какой по падежам

сочинение мой самый счастливый день