Exercise 4

Given:
5 planar elements of 9x9
9 planar elements of 6x9
11 isosceles right triangles with sides length 9cm

 
I didn't really had trouble  with the triangles in this work becouse I had no idea what their potencial was. I was trying to make more compact and stable design with groups only. After critics I realized I must respetect all of the elements.