35 Degrees. This is because the a straight line is 180 degrees. Knowing this, 180-100= 80. 80+65= 145. 180-145=35 which is the missing angle.
I believe the answer is
<h2>D.</h2>
<u>''Twice as many students will take art as will take choir''</u>
<u />
<h3>There are 80 students taking art, and 40 students taking choir. </h3><h3>Art is twice the size of choir.</h3><h3 />
(I'm giving away free points in my question)
I hope this helped! +*♡