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Ребро правильного тетраэдра равно 3√2 см. Найдите площадь поверхности тетраэдра.
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Предмет:
Математика -
Автор:
saramcgee - 6 лет назад
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Ответы 1
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Sпов.=4*SΔ, треугольник правильный, т.к. по условию тетраэдр правильныйSΔ=a²√3/4, а - правильного треугольникаSΔ=(3√2)² *√3/4Sпов.=((18√3)/4)*4=18√3 см²
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Автор:
damienngsb - 6 лет назад
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