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A right triangle can have 2 equal angles if they are each 45° (any other right triangle will have no equal angles)
Each triangle has 180 degrees on the inside angles.
three each of 60 degrees
An isosceles triangle can have 1 right angle providing that the other 2 angles each measure 45 degrees.
If each of its 3 angles are 60 degrees then it is an equilateral triangle If each of its 3 angles are different acute angles then it is a scalene triangle