Copy down these notes into your notebook for points
This is a short video on how to use angles of elevation and depression to measure lengths and angles
Source: http://www.schooltube.com/video/ca5bb9814767ca27bd23/Angles%20of%20Elevation%20&%20Depression
This video goes through a few examples of using angles of elevation and depression.
Source: http://www.youtube.com/watch?feature=player_detailpage&v=vqgmkxcLcM4