equilateral triangle (and so, if it is in Euclidean (plane) space, it has 3 angles all of which are 60°) otherwise (in Hyperbolic or Spherical space) it is an isosceles triangle.
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An equilateral triangle has 3 equal angles of 60 degrees that add up to 180 degrees
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It is a triangle with 90, 60, and 30 degree angles.
A triangle with no equal sides or angles is known as a scalene triangle. Equilateral triangles, by contrast, have three equal sides and three 60 degree angles.
If all sides of a triangle are of equal length, then all the angles are the same. The sum of the angles of a triangle is 180 degrees. If all 3 angles are the same, divide 180 by 3 = 60 degree angles.