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Ответ

Ответ дан
liza0627

Ответ:

1) 24+18= 42 см. Вторая сторона

2) 42÷2=21 см. Третья сторона

3) 24+21+41=87 см. Периметр треугольника

Ответ

Ответ дан
Zakku

Ответ:

87 см

Объяснение:

24 + 18 = 42 (вторая)

42 : 2 = 21 (третья)

24 + 42 + 21 = 87 см

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