Proof: Distance Property 4
Let's prove the following theorem:
if distance AB = distance CD, then distance DC = distance BA
    
    
Proof:
Proof Table
| # | Claim | Reason | 
|---|---|---|
| 1 | distance AB = distance BA | distance AB = distance BA | 
| 2 | distance BA = distance CD | if distance AB = distance BA and distance AB = distance CD, then distance BA = distance CD | 
| 3 | distance CD = distance DC | distance CD = distance DC | 
| 4 | distance DC = distance BA | if distance BA = distance CD and distance CD = distance DC, then distance DC = distance BA | 
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