Угол при вершине равнобедренного треугольника равен 60 ° найти отношение высоты треугольника к его основанию

Speaking Task 1. Choose the question from the card on the topic Entertainment and fedia^ prime prime and be ready to answer it after the teacher starts the conversation. Produce a speech by giving extended answers to the questions. Share your ideas with the class. Teacher organizes a Socratic seminar, which helps him/her to assess learners while they are speaking on the toplic Entertainment and Media and he/she prepares and cuts down questions and expressions beforehand. Learners sit in a circle and answer the question using in their speech some formal and Informal expressions to present logically connected information to their classmates. Expressions: Stating an opinion The way I see it... Sorry to interrupt, but... Is it okay if I jump in for a second? Can I add something here? Can I throw my two cents in? Not necessarily Interrupting If I might add something..... I beg to differ No, I'm not so sure about that That's for sure Expressing disagreement I'd say the exact opposite I have to side with somebody (name)on this one I was just going to say that In my opinion Expressing agreement If you ask me.. That's exactly how I feel As far as I'm concerned. If you want my honest opinion..... You have a point there That's not always the case​

Объяснение:

Дано: параллелограмм Abcd

Bc=ad и ab=cd

угол b(3)=d(4) и угол a(1)=c(2)

Ac b Bd -диагонали

Пусть точка пересечения О

Док-ть: треугольник воа=соd и вос=аоd

Док-во:

1. Тк диагонали параллелограмма точкой пересечения делятся пополам. (2ое свойство), то треугольники аво и соd равны по стороне и двум прилежащим углам ( ав=сd как противоположные стороны параллелограмма, угол 1=2 и угол 3=4 как накрест лежащие углы при пересечении параллельных прямых ав и сd секущими ас и вd соответственно).

Следует ов=оd и ао=ос.

2. По аналогии:)

Удачи, я старалась. В теореме всё расписано, посмотри и постарайся понять) я верю в тебя!