# Angle of Elevation and Depression

Pronunciation: /'æŋ.gəl ʌv ˌɛləˈveɪ.ʃən ənd dəˈpɹɛ.ʃən/ Explain

 Click on the points and drag them to change the figure. Why can't the object move below the observer? Manipulative 1 - Angle of Elevation Created with GeoGebra.

 Click on the points and drag them to change the figure. Why can't the object move above the observer? Manipulative 2 - Angle of Depression Created with GeoGebra.

Manipulative 2 - Angle of depression. Created with GeoGebra.

An angle of elevation is the angle above horizontal that an observer must look to see something above the horizon.[2] An angle of depression is the angle below horizontal that an observer must look to see something below the horizon.

### References

1. McAdams, David E.. All Math Words Dictionary, angle of elevation. 2nd Classroom edition 20150108-4799968. pg 16. Life is a Story Problem LLC. January 8, 2015. Buy the book
2. angle of elevation. merriam-webster.com. Encyclopedia Britannica. Merriam-Webster. Last Accessed 6/12/2018. https://www.merriam-webster.com/dictionary/angle%20of%20elevation. Buy the book
3. depression. merriam-webster.com. Encyclopedia Britannica. Merriam-Webster. Last Accessed 6/12/2018. https://www.merriam-webster.com/dictionary/depression. Buy the book
4. Hedrick, E.R.. Constructive Geometry. pg 52. www.archive.org. The Macmillan Company. 1916. Last Accessed 6/12/2018. http://www.archive.org/stream/constructivegeom00hedriala#page/52/mode/1up. Buy the book

McAdams, David E. Angle of Elevation and Depression. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. https://www.allmathwords.org/en/a/angleofelevation.html.

### Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
6/14/2018: Removed broken links, changed Geogebra links to work with Geogebra 5, updated license, implemented new markup. (McAdams, David E.)
5/5/2011: Initial version. (McAdams, David E.)

All Math Words Encyclopedia is a service of Life is a Story Problem LLC.