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An Isosceles Triangle is a triangle with all angles less than 90o So there are no obtuse angles (between 90o to 180o).
It doesn't matter if a triangle is isosceles, scalene, obtuse, acute... There are always 3 angles in a triangle (which add up to 180).
In an isosceles triangle, two of the angles are the same.
An obtuse triangle can have no right angles, and has two equal angles.
there are three angles on an isosceles triangle