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October 28th, 2011, 02:33 AM  #1 
Newbie Joined: Oct 2011 Posts: 1 Thanks: 0  is there a negative angle?
Hi, I am solving now a geometry problem, and I wanted to ask if it is possible to have a negative value for an angle? I know that with the trigonometry functions it is possible, but I wanted to know if an angle of triangle can have a negative value? Thank you. 
October 28th, 2011, 03:00 AM  #2 
Senior Member Joined: Nov 2010 Posts: 288 Thanks: 1  Re: is there a negative angle?
Hello there you can't have a negative value for an angle in the same sense that you can't have a negative value of a length a square and a volume. However, a negative sign might mean direction in the same sense it is used in vectors and trigonometry. 

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