Final answer:
To prove l || n, we use the Transitive Property of Parallel Lines in Mathematics.
Step-by-step explanation:
To prove that l || n, we need to establish a relationship between j, k, m28, and m29. Since it is given that j || k and m28 + m29, we can utilize the Transitive Property of Parallel Lines to prove that l || n.
Step 1: Given j || k
Step 2: Given m28 + m29
Step 3: Since j || k and m28 + m29, we can use the Transitive Property of Parallel Lines to conclude that l || n.