Предмет: Геометрия, автор: Stasya1712

Основания прямоугольной трапеции равны 12 см и 20 см, а острый угол трапеции - 60 градусов. Найдите большую боковую сторону трапеции.

Ответы

Автор ответа: nestyme

два варианта в конце(а и б) какой Вам стоит использовать зависит от того, прошли ли Вы функции острых углов.

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Автор ответа: Матов

Опустим высоту ВН, теперь рассмотим прям треугольник АВН , углы даны теперь по теореме синусов найдем АВ

AB/sin90=8/sin30

AB=16 .

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