Practice Questions
| 1. | Determine the area of the room's layout Difficulty: medium | 
                                    
                                    3
                                 | 
| 2. | Find the area of the regular octagon Difficulty: hard | 
                                    
                                    6
                                 | 
| 3. | Find the other diagonal of rhombus Difficulty: easy | 
                                    
                                    1
                                 |