14. You divide the length of ribbon by the size of the pieces wanted so you get
49/3.5 = 14
 
        
             
        
        
        
5,7 and 8 are right angles, and 6 is an acute angle this is because of u look at 9 and 10 you can see a little box looking thing under the h and if u do that to all of them 5, 7 and 8 can fit the little box but 6 you can’t because it is an acute angle. Hope this helped!