Equilateral triangle - Wikipedia, the free encyclopedia

Equilateral triangle - Wikipedia, the free encyclopedia

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日期:2025-06-28
In geometry, an equilateral triangle is a triangle in which all three sides are equal. In traditional or Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°. ...看更多