From the diagram, we can see that angle measure 53 and the angle labelled "6" are colinear (that is, they both lie on a straight line).
Angles on a straight line add up to 180 degrees.
Therefore;
[tex]\begin{gathered} 53+\angle6=180 \\ S\text{ubtract 53 from both sides;} \\ 53-53+\angle6=180-53 \\ \angle6=127 \end{gathered}[/tex]
ANSWER:
The measure of the indicated angle is 127 degrees.
