The sum of the interior angles of any triangle, including and equilateral triangle, is 180 degrees.
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Yes, equilateral triangles have congruent interior angles, and each of the three interior angles measures 60 degrees.
If exterior angles are 120 then interior angles must be 60 so you have an equilateral triangle
The sum of the interior angles is 360.
The 3 interior angles of 60 degrees add up to 180 degrees
None. All angles are 108 degrees. Sum of interior angles of n-sided figure = (2n - 4) right angles. In a pentagon this is 540 degrees