Question

why the shape of aeroplanes is like a bird in friction

Answer 1

They both have Streamlined shape

So that the friction can be reduced as symmetrically Streamlined bodies Reduce the friction

Answer 2

Though the shape of aeroplanes are not like bird but the function of aeroplanes are like birds. the aeroplane makers made aeroplane aerodynamics that will help aeroplane to glid in air like eagle. in this mechanism the fuel efficiency will increase and the aeroplane will travel much long path . And it also helps when the plan take of or land