| Value | Category | Cases | |
|---|---|---|---|
| 1 | Irregular shape | 29 | 
                                    
                                    13.1%
                                 | 
| 2 | Rectangle | 45 | 
                                    
                                    20.3%
                                 | 
| 3 | Square | 124 | 
                                    
                                    55.9%
                                 | 
| 4 | Triangle | 24 | 
                                    
                                    10.8%
                                 |