The measure of the angle of the straight line is equal to the 180 degree. the measure of the
is equal to the
which is 30 degrees. Thus the option 4 is the correct option.
<h3>
Given information-</h3>
The measures of the angle <em>KLH </em>is 120 degrees.
The image is attached below for the given problem.
<h3>Angle of the straight line</h3>
The measure of the angle of the straight line is equal to the 180 degree.
The line <em>KLM </em>is a straight line thus the angle of the line <em>KLM</em> is equal to the 180 degrees.
The value of the angle<em> ILH</em> is 30 degrees given in the figure.
The value of the angle<em> KLH </em>is given in the question which is equal to the 120 degrees. Thus,

Take the angle <em>KLH</em> and the angle<em> ILH</em> on the other side,



Thus the measure of the
is 30 degrees.
As the measure of the
is equal to the
which is 30 degrees. Thus the option 4 is the correct option.
Learn more about the angle of the straight line here;
brainly.com/question/24024505