What is the shortest distance between points B and A?

Study the following information carefully and answer the questions given below. A boy from point B walks towards the west for 6 m and turns to his left at point C, from where he walks for 4 m and reaches point
D. Then, he turns to his right and walks for 9 m to reach point E where he turns to his left. Then he walks for 12 m and reaches point F. He walks for 3 m after taking a left turn and reaches point G. Then he walks for 6 m towards the north to reach point H from where he turns to his right and walks for 12 m to reach point
A.