Supplementary Angles that are not a Linear Pair
http://www.hayspost.com/?attachment_id=1786
This is an image of a railroad crossing sign. The geometric idea of supplementary angles that are not a linear pair because the two angles highlighted in blue are right angles, their sum is 180 which is a supplementary angle. They do not share a line so they are not linear. This object was found online. In the real world in can be found near railroads, and it is used to indicate a road and a railroad track intersection.
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