TOPICS
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
Geometry
Plane Geometry
Triangles
Special Triangles
Other Triangles
Geometry
Plane Geometry
Triangles
Special Triangles
Equilateral Triangles
Napoleon Triangles
See
Inner Napoleon Triangle
,
Outer Napoleon Triangle