Вопрос школьника по предмету Геометрия
В правильной треугольной пирамиде SABC точка M – середина ребра AB, S – вершина. Известно, что BC = 6, а SM = 12. Найдите площадь боковой поверхности пирамиды.
Ответ учителя по предмету Геометрия
6×12÷2=36
………..
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