2. В равнобедренном треугольнике ABC проведена биссектриса ВО.
Докажите, что треугольник АВО = треугольнику овс;​

67 градусов !

если всё построить правильно и соединить точки, то получится параллелограмм, а по определению: противоположные стороны параллелограмма параллельны. доказано.

if you are a real friend to bob you must talk to him. you should stop him. cheating is bad for his study. how will he be able to pass exams? think of it! you can explain and help him but don't give him your copy book for coping. i never had such a situation. i know it will be difficult to explain to him. but you must try. it is better for him. if he is your real friend he will undestand.