P = 22см
b = 4см
S - ?
P = 2*a + 2*b = 2*a + 8
2*a + 8 = 22
2*a = 14
a = 7
S = a*b = 7*4 = 28 см
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2a=22-8
2a=14
a=7
s=ab
s=4×7=28
P = 22см
b = 4см
S - ?
P = 2*a + 2*b = 2*a + 8
2*a + 8 = 22
2*a = 14
a = 7
S = a*b = 7*4 = 28 см