60
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60 degrees and it is an equilateral triangle.
It will be an equilateral triangle and each interior angles measure 60 degrees.
Either could have a larger interior angle. If they were regular, then the interior angle of a triangle would be 60 degrees whereas that of a heptagon would be 128.57 degrees. The REGULAR heptagon would have a larger interior angle than a REGULAR triangle.
3 and it will be an equilateral triangle
Each interior angle will measure 162 degrees