A triangle with no equal sides is called a scalene triangle.
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They are congruent triangles.
There are three types of triangles. Scalene triangles have no congruent sides or angles, equilateral triangles have 3 congruent sides and 3 60degree angles, and isosceles triangles have two congruent sides and two congruent angles.
Equilateral triangles have three congruent sides and three congruent angles
3 because equilateral triangles are triangles that have 3 congruent sides.
Only if the congruent angle is the angle between the two congruent sides (SAS postulate).