Предмет: Геометрия, автор: olesamihajluk92

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Автор ответа: tzusupov5

1

Ответ:

У равнобедренного треугольника две стороны равны. Иными словами, неизвестная сторона может быть равна либо 3 см, либо 10 см.

По теореме о существовании треугольника, сумма двух любых его сторон должна быть больше третьей. Если неизвестная сторона равна 3, то по теореме (3 + 3) > 10, что неверно. Следовательно неизвестная сторона равна 10 см.

Ответ: 10 см.

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