Предмет: Геометрия, автор: callofdutykorea178

Похилі AD і DC на площині а дорівнюють відповідно 3 см і 6 см, а кут між ними дорівнює 60⁰. Обчисли відстань між кінцями проекцій похилих.​

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Ответы

Автор ответа: ludmilaksenija2005
0

Объяснение:

из теоремы косинусов:

АС=√(АD²+DC²-2•AD•DC•cosADC)=

=√(3²+6²-2•3•6•cos60)=

=√(9+36-36•1/2)=√27 см

DB - перпендикуляр

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