Пошаговое объяснение:ВС = АВ + 3 1/2 = 8 5/6 + 3 1/2 = 12 1/3
AC = 12 1/3 - 2 1/4= 10 1/12
P = AB + BC+ CA = 8 5/6 + 12 1/3 + 10 1/12 = 30 15/12 = 31 1/4
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Пошаговое объяснение:ВС = АВ + 3 1/2 = 8 5/6 + 3 1/2 = 12 1/3
AC = 12 1/3 - 2 1/4= 10 1/12
P = AB + BC+ CA = 8 5/6 + 12 1/3 + 10 1/12 = 30 15/12 = 31 1/4