Answer:
-The Relationship:
Both 
 and the 
 angle are supplementary.
The measure of 
:

Explanation:
-The relationship about both 
 and the 
 angle, is that they are supplementary, which they both add up to 
.
-To find the measure of 
, you need to subtract 
 from 
 to get the actual angle measurement of 
:
Finding the measure of 
:


So, now you have the measure of 
 .