An isosceles triangle has exactly two sides which are equal. (The word congruent usually applies to triangles, not sides.)
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If it's an equilateral triangle then its 3 sides are congruent but if it's an isosceles triangle then only 2 of its sides are congruent
2 sides
Isosceles triangles have 2 sides that are equivalent and 2 angles that are congruent.
Equilateral, Isosceles and Scalene are three types of triangles classified based on how many congruent sides the triangle has.
If its in the form of an isosceles right angle triangle then it will have 2 equal sides.