Sзакр = x * x * sin a = 50 м^2
S = 9 * 9 * sin a = 72 м^2
x^2 / 81 = 50/72
x = 7,5
Ответ: 7,5
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Sзакр = x * x * sin a = 50 м^2
S = 9 * 9 * sin a = 72 м^2
x^2 / 81 = 50/72
x = 7,5
Ответ: 7,5