Răspuns :
a |-----|-12-| } 30
b |-----|
30 - 12 = 18 ( 2 segmente egale )
18 : 2 = 9 ( un segment )
a = 9 + 12 = 21
b = 9
b |-----|
30 - 12 = 18 ( 2 segmente egale )
18 : 2 = 9 ( un segment )
a = 9 + 12 = 21
b = 9