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 Everyday Examples
 Adjacent Angles:  Angles in the same plane that have a common vertex and a common side, but no common interior points.


Image source: http://www.marcosoft.com/quovadis/description/searching/images/Intersection.blue.gif

Street intersections create adjacent angles.

Image source: http://www.best.com/~solvers/bridge.ink.84.gif

Crossbeams on a bridge also have adjacent angles.