P = AB + DC + CD + DA
AB = X ( cm )
ВС = Х - 2 ( см )
DA = CD = X + 2 ( cm )
X + X - 2 + 2 * ( X + 2 ) = 2X - 2 + 2X + 4 = 4X + 2
4X + 2 = 22
4X = 24
X = 6 ( cm ) AB
6 - 2 = 4 ( cm ) BC
ответ 4 см
P = AB + DC + CD + DA
AB = X ( cm )
ВС = Х - 2 ( см )
DA = CD = X + 2 ( cm )
X + X - 2 + 2 * ( X + 2 ) = 2X - 2 + 2X + 4 = 4X + 2
4X + 2 = 22
4X = 24
X = 6 ( cm ) AB
6 - 2 = 4 ( cm ) BC
ответ 4 см