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move down "any three points"
[[Image:Triangle.png|right]]
[[Image:Triangle.png|right]]
A '''triangle''' is a three-sided [[geometric]] [[shape]], made by any three points that are not [[collinear]].
A '''triangle''' is a three-sided [[geometric]] [[shape]].
In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
A triangle is defined by any three points that are not [[collinear]].
==Naming conventions==
==Naming conventions==