How do you write a two column proof with angles

1. Start with the information that is given in the problem. 
2. Draw a picture of the proof and label it with the given information. 
3. There must be a reason for every statement in the proof, on both sides of the columns. 
4. The order of the proof should make logical sense, so ensure that you are ordering the proof in the correct order. 
5. Use symbols to help guide this process. Proofs contain many symbols and abbreviations that make the process much simpler. 

Aline graph should be used