Длина:9 1/2•2=19
Р=2(9 1/2+19)=2•28,5=57(м)
b = 9 1/2 = 19/2 m
a = 2 * 9 1/2 = 19 m
P = 2 * ( a + b ) = 2 * ( 19 + 19/2 ) = 2 * 28.5 = 57 m
Длина:9 1/2•2=19
Р=2(9 1/2+19)=2•28,5=57(м)
b = 9 1/2 = 19/2 m
a = 2 * 9 1/2 = 19 m
P = 2 * ( a + b ) = 2 * ( 19 + 19/2 ) = 2 * 28.5 = 57 m