Thread: Did I do the following two column proof correctly?

Here' what I came up with:

Given: ;
Prove:

Statements:
1. ;

2. ;

3.

4.

Reasoning:
1. Given

2. Angle addition postulate

3. Addition property of equality

4. Substitution



Am I right?

All the steps I added have red numbers. The things I changed are in red as well.

Statements:
1. ;

2. ;

3.

4.

5.

6.

Reasoning:
1. Given

2. Angle addition postulate

3. Transitive property (or Substitution)

4. Transitive Property (or Substitution)

5. Substitution

6. Subtraction property of equality

To other helpers:

Does anyone else use the transitive property? Or was that just my teacher...

Originally Posted by Quick

Does anyone else use the transitive property?

I use "transitive" because "substitution" is not well-defined for me.