Equilateral triangle
Shape with three equal sides / From Wikipedia, the free encyclopedia
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"Equilateral" redirects here. For other uses, see Equilateral (disambiguation).
In geometry, an equilateral triangle is a triangle in which all three sides have the same length. In the familiar Euclidean geometry, an equilateral triangle is also equiangular; that is, all three internal angles are also congruent to each other and are each 60°. It is also a regular polygon, so it is also referred to as a regular triangle.
Quick Facts Type, Edges and vertices ...
Equilateral triangle | |
---|---|
Type | Regular polygon |
Edges and vertices | 3 |
Schläfli symbol | {3} |
Coxeter–Dynkin diagrams | |
Symmetry group | D3 |
Area | |
Internal angle (degrees) | 60° |
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