| Step | Hyp | Ref | Expression | 
						
							| 1 |  | linecgrand.1 |  | 
						
							| 2 |  | linecgrand.2 |  | 
						
							| 3 |  | linecgrand.3 |  | 
						
							| 4 |  | linecgrand.4 |  | 
						
							| 5 |  | linecgrand.5 |  | 
						
							| 6 |  | linecgrand.6 |  | 
						
							| 7 |  | linecgrand.7 |  | 
						
							| 8 |  | linecgrand.8 |  | 
						
							| 9 |  | linecgrand.9 |  | 
						
							| 10 |  | linecgrand.10 |  | 
						
							| 11 | 7 8 | jca |  | 
						
							| 12 | 9 10 | jca |  | 
						
							| 13 |  | linecgr |  | 
						
							| 14 | 1 2 3 4 5 6 13 | syl132anc |  | 
						
							| 15 | 14 | adantr |  | 
						
							| 16 | 11 12 15 | mp2and |  |