Предмет: Геометрия, автор: gnezdilova2008u

на рисунке AB AD u DC BC

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Автор ответа: karimtagir3

Объяснение:

Если AB=AD, DC=CB и AC- общая сторона, значит эти треугольники равны по 1 признаку, следовательно углы DAC=CAB по свойству. Значит АС делит угол DAB на два равных угла, значит это биссектриса)))

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