| Directions: Prepare a formal proof for each problem. Only one possible answer will be shown for each question.
 
 
              
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                    | 1.  | 
                      
                        
                          Given: m  || n  and a || b 
                          Prove: ∠ 3    ∠13
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                    | 2.  |  |  |  |      
              
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                    | 3.  |  |  |  |      
              
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                    | 4.  |   |  |  |      
              
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                    | 5.  |   |  |  |      
              
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                    | 6.  | 
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