Узнайте периметр хоккейной коробки,если её длина 18 м,а ширина на 80 дм меньше.
spanielskubidu1
1
23.09.2019 19:50
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1
Периметр 18*2+8*2=52 м
180-80=100(дм)
100дм = 10м
(10+18)*2=52(м) - Р коробки.
ответ: Р коробки = 10м