Предмет: Геометрия, автор: may1106

Ортогональною проекцією рівнобічної трапеції на пло- щину а є трапеція площею 50 см^2. Знайдіть кут між пло щиною а і площиною даної трапеції, якщо основи цієї трапеції дорівнюють 5 см і 15 см, а діагональ перпен дикулярна до бічної сторони

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Simba2017: надо найти площадь самой трапеции
Simba2017: h^2=10*5=50; h=5V2 (V-знак корня)
Simba2017: S=(5+15)/2*5V2=50V2
may1106: Можна будь ласка повний розвʼязок з малюнком?
Simba2017: cos x= 50/(50V2)=V2/2; x=45
Simba2017: https://znanija.com/task/33800775

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Автор ответа: dmytropendak
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