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Поделитесь своими знаниями, ответьте на вопрос:
Периметр каждой фигуры равен 47 см. найди неизвестные стороны
Рисунок в приложении
А)
нам дан треугольник
Р=а+b+с
Пусть с неизвестная сторона
с=Р-а-b
с=47-14-13
с=20см - неизвестная сторона
Б )
Нам дан четырехугольник
Р=а+b+c+d
Пусть a неизвестная сторона
a=Р-c-b-d
a=47-12-8-10
a=17 см - неизвестная сторона