Предмет: Геометрия, автор: jaksilikovadani

В треугольнике АВС угол С равен 100 градусов, АС=ВС. Найдите угол А

Ответы

Автор ответа: alexgan09
122
Так как АС=БС, то этот треугольник равнобедренный, а значит, 2 стороны одинаковые. Угол С здесь является углом при вершине, значит одигакрвые другие 2 угла.
уголА=(180-100):2=40°
Ответ: угол А равен 40 градускм.
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