This is a picture of a keyboard. It is also an example of supplementary angles that are not a linear pair. This is shown because these angles form a straight line but are not touching therefore they are not a linear pair but they are supplementary. Keyboards are used with every computer (at least i hope so) to type up papers, notes, projects, ect... This keyboard can be found in the library and was taken off my phone. Keyboards are used and manufactured in the information technology industry as well.
Shiv Saini
October 19th, 2012
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