no,three points can be non collinear
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A set of three points equidistant around a point is called an equilateral triangle. In geometry, an equilateral triangle is a triangle in which all three sides are equal in length. The angles in an equilateral triangle are also equal, each measuring 60 degrees.
A set of points forming a straight line.
The solution set for a given equation is the set of all points such that their coordinates satisfy the equation.
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