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Isosceles triangles have 2 sides that are equivalent and 2 angles that are congruent.
It has to have at least 2 congruent angles and/or sides to be isosceles. Therefore, an equilateral angle would be isosceles.
An isosceles triangle has 3 sides two of which are of equal lengths it also has 3 interior angles two of which are of equal sizes.
In an isosceles triangle, two of the angles are the same.
there are three angles on an isosceles triangle