Writing A Two-Column Proof The first step is to write what is given. You write in exact words from what is given in the statement column, and write given in the reason column. Once you finish that, you need to

finish it off with what you need to

prove. Once you do that, You are

finished. Quiz

1. What side do the statements go on?

2. What side do the reasons go on?

3. Use basic definitions, postulates, and

{ fill in blank } to write your proof?

4. What 2 things do you need to do before you

write your proof?

5. What is the reason for the "Given"

statement Answers 1. Left

2. Right

3. Theorems

4. Brainstorm and figure

out the theorems you will use

5. Given Results The First Step The End When writing a proof, nothing can be assumed. You need to prove every little detail in

order to solve

the problem. Using your knowledge of basic definitions along with different theorems and postulates you have learned, you can write a fantastic proof. Before you start... Brainstorm how you will prove it and find out what theorems you will use This is an example of a two column proof. The statement goes on the left and the reason for that goes on the right. This is the how you will set up all of your two column proofs. Next you need to get all your statements

and reasons that lead up to what you are

trying to proof. You need to include every little detail, even if you think it is common sense. Also, you can't assume anything. Here is a another example proof... Review Here is a website so you can practice your proofs http://feromax.com/cgi-bin/ProveIt.pl

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# Writing a Two-column Proof in Geometry

step by step and examples of a two column proof

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