isosceles
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an isoceles triangle has two equal sides and therefore has two angles that are congruent.
That is correct as in the case of an isosceles triangle
An isosceles triangle.
No, An equilateral triangle has 3 congruent angles, an isosceles triangle has 2 congruent angles, a scalene triangle has no congruent angles.
An obtuse triangle must have two acute angles and these can be congruent.