Предмет: Геометрия, автор: Ruyzake

Диагональ ВД паралеллограмма АБСДперпендикулярна к стороне АД.Найти площадь АБСД,если АБ=12см,а уголА=зо градусов.Помогите, пожалуйста.

Ответы

Автор ответа: DashaClever

треугольник АБД прямоугольный

если угол А=30 градусам ,гипотенуза 12;

то сторона ,лежащая напротив угла в 30 градусов равна половине гипотенузы т.е.

ДБ=6см

следовательно S=АБ*ДБ=12*6=72кв.см

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d) ladder
e) turnover
f) example

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3.What three major advantages of recruiting apprentices are mentioned in the task-force report?
4.How much did ВТ save?
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