# Talk:Trigonometry/Angles

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I have not seen angle defined as the measure of the arc length in a reference unit. As angle is a dimensionless metric, then angle needs to be a ratio but the way it is presented here it is the measure of the arc.

please advise, DrJoe 22:05, 23 November 2010 (UTC)

- Amongst mathematicians it is common to define an angle to be the arc length along a
*unit*circle that is specifically the circle of radius 1. Of course in most contexts mathematicians are not usually concerned with whether or not a particular number is dimensionless. Of course the whole conversation often get people generally confused when it is recognized that degrees are also necessarily dimensionless. But I will do what I can to improve the definition. Thenub314 22:29, 23 November 2010 (UTC)

## Title of this resource[edit source]

"Basics of X" is an unsatisfactory title for Wikiversity mainspace. The title would be more appropriately X, or X/Basics if there is more developed on the topic. With a topic as small as this, the topic might be a subpage, such as Trigonometry/Angles. Any other ideas? --Abd (discuss • contribs) 12:45, 6 September 2014 (UTC)

- On second thought, I looked at Topic:Trigonometry and am organizing all the links ("Lessons") as subpages of Trigonometry, this being very obviously useful and simple. --Abd (discuss • contribs) 12:55, 6 September 2014 (UTC)