Write twocolumn proofs for Review Exercises 39 to 46.
Given: 

Prove: 

To find:
The twocolumn proof for
Given:
The given figure is,
Figure
Definition:
If the sum of two angles is
Approach:
The reasons for given statements is explained in table below.
Statements  Reasons 
1. 
1. Given 
2. 
2 
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