Предмет: Геометрия, автор: Aska16

В треугольнике АВС проведена бисспктриса ВД, угол А равен 75°, угол С 35° 1) докажите что треугольник ВДС- равнобедренный 2) сравните отрезки АД и ДС

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Автор ответа: сс27061995

биссиктрисса делит угол попалам сумма угло в трегольнике ровна 180 тоесть 75+35=110 это мы нашли угол В тепрь находим углы В1 и В2 рассмотрим треугольник BDC угл В1 равен 55 градусоввот в общем угл Д с обоих сторон получился 90 градусов, треугольник не может быть равнобедренным углы при основании не равны

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