P равнобедр. треугольника 26 см ,а основа 8 см найти боковые стороны
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13.09.2021 12:30
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P равнобедр. треугольника= боковая сторона + боковая сторона + основание
26-8=18 см-две боковые стороны
По св-ву р/б треугольника, боковые стороны всегда равны
18:2=9 см-боковая сторона
ответ: 9 см.