1) периметр правильного треугольника 23,8 см . найдите его периметр. 2) длина стороны правильного треугольника 23,8 см . найдите его периметр
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20.08.2019 16:10
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3
2) 23,8×3=71,4 см
2) 23,8+23,8+23,8=71,4 (см) - периметр
ответ: 71,4 см