: Mathématiques: equilateral triangle

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equilateral triangle

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.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Equilateral_triangle)

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