If the other two angles are equal then it's an isosceles triangle if they are not equal then it's an obtuse triangle.
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An isosceles triangle
Each of the interior angles of an equilateral triangle is 120 degrees.
Angle A + Angle B + Angle C = 180 degrees. 30+90+C=180 120+C=180 C=60 degrees.
30 degrees each
Scalene