Answer
$61^o$
Work Step by Step
$\angle AOC\ and\ \angle COB$ are supplementary. $\angle AOC$ has a measure of 119 degrees, so it follows that:
$\angle \space COB=$$180^o-119^o=61^o$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 12 - Section 12.1 - Angles and Polygons - Exercise - Page 387: 15
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