диагонали трапеции взаимно перпендикулярны. одна из них 48 см, средняя линия 25см. найти высоту.

верещагин 2 класс стр192 упр 8 перевести текст Ted: hello Vova! Vova: Hello! Ted: Let’s talk about sports today. Vova: It’s O.K. with me. Ted: Do boys and girls in Russia like to play sports games? Vova: Yes, they like to play sports games very much Ted: What sports games do boys like to play? Vova: Oh, football, volleyball, basketball, tennis, hockey… Ted: And what about girls? Do they play football and hockey, too? Vova: I don’t think they do. Ted: And in Great Britain do. I know in Russia girls like to play snowballs, skate, ski and sledge. Is that so? Vova: Yes, but boys like to play these games, too. And what about you? What sports games can you play well? Ted: I think I can play volleyball and tennis well. We’ve got a very nice sport ground at our school. And all the boys girls love to go to our sport ground. What sports do you like? Vova: I like to swim. I think I can swim well. I go to the swimming pool with my father and brother. Ted: Oh, you’ve got a brother. What’s his name? How old is he? Vova: his name is Vasya. He is four but he can swim very well. Ted: Can he? Vova: Yes, he can. And he loves it! Ted: I see.do you want to be a sportsman? Vova: Yes, I do. Ted: And so do I .now it’s time to say goodbye. Goodbye, Vova. Vova: Bye, Ted.

почему в районах высокой влажности трудно переносить повышение температуры?

плот массой 400 кг и длиной 10 метров покоится в неподвижной воде . два мальчика с массами 60 кг и 40 кг , стоящие на противоположных концах плота , одновременно начинают двигаться навстречу друг другу с одинаковой скоростью и останавливаются при встрече . на какой расстояние при этом сместиться плот?