GRE
GRE Quantitative Reasoning Section
Measure of Angles in Intersecting Lines
Easy Geometry Lines And Angles
In the figure below, lines $l$ and $m$ intersect at point $O$. If angle $AOB$ measures $120^{\circ}$ and angle $BOC$ measures $x$, what is the measure of angle $COD$ if angle $AOD$ is a straight angle?
Hint
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