Right Angle (original) (raw)
Algebra Applied Mathematics Calculus and Analysis Discrete Mathematics Foundations of Mathematics Geometry History and Terminology Number Theory Probability and Statistics Recreational Mathematics Topology
Alphabetical Index New in MathWorld
A right angle is an angle equal to half the angle from one end of a line segment to the other. A right angle is 
radians or 
. A triangle containing a right angle is called a right triangle. However, a triangle cannot contain more than one right angle, since the sum of the two right angles plus the third angle would exceed the 
total possessed by a triangle.
The patterns of cracks observed in mud that has been dried by the sun form curves that often intersect in right angles (Williams 1979, p. 45; Steinhaus 1999, p. 88; Pearce 1990, p. 12).
See also
Acute Angle, Full Angle, Gnomon, Oblique Angle, Obtuse Angle, Orthogonal Lines, Perpendicular, Right Triangle, Semicircle, Straight Angle, Thales' Theorem Explore this topic in the MathWorld classroom
Explore with Wolfram|Alpha
References
Pearce, P. Structure in Nature Is a Strategy for Design. Cambridge, MA: MIT Press, 1990.Steinhaus, H. Mathematical Snapshots, 3rd ed. New York: Dover, 1999.Williams, R. The Geometrical Foundation of Natural Structure: A Source Book of Design. New York: Dover, 1979.
Referenced on Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Right Angle." FromMathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RightAngle.html