Right angle
From AoPSWiki
A right angle is the angle formed by two perpendicular lines. The measure of every right angle is 90 degrees or 
radians.
See Also
This article is a stub. Help us out by expanding it.
 Check out Art of Problem Solving's Introduction to Algebra by Richard Rusczyk. |
A right angle is the angle formed by two perpendicular lines. The measure of every right angle is 90 degrees or radians.
This article is a stub. Help us out by expanding it.
