Предмет: Геометрия, автор: pegorova778

СРОЧНО!!!!
ПОЛНОСТЬЮ РАСПИСАТЬ ДОКАЗАТЕЛЬСТВО!!

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Автор ответа: homiachok01

1

Ответ:

рассмотрим треугольники ADM и NEC. они равны по двум сторонам и углу. угол М равен 90 и угол N = 90

АM=NC

AD принадлежит АВ , EC принадлежит ВС. а значит если АВ=ВС то AD=EC

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