The two-column proof that proves 
 this is that the angle opposite the longer side (LK) is larger than the angle opposite the shorter side (MN).
 this is that the angle opposite the longer side (LK) is larger than the angle opposite the shorter side (MN). 
Given that 
 , we need to prove that
, we need to prove that 
 .
.
Here is the two-column proof:
Statement 1: 
 (Given) Reason: Given
 (Given) Reason: Given
Statement 2: 
 (Given) Reason: Given
 (Given) Reason: Given
Statement 3: 
 Reason: In a triangle, if one side is longer than another, the angle opposite the longer side is larger. This is a property of triangles.
 Reason: In a triangle, if one side is longer than another, the angle opposite the longer side is larger. This is a property of triangles.
This completes the proof. The angle opposite the longer side (LK) is larger than the angle opposite the shorter side (MN). 
Thus, from the two-column proof, we can conclude that 
 .
.