no, there is not a general formula for all angles
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360/number of sides = exterior angle
Exterior Angle = 360/number of sides. Interior Angle = 180 - Exterior Angle. Combining Interior Angle = 180 - (360/number of sides).
that's geometry so the formula to find the measure of each interior angle of a regular polygon is: Ia=stands for internal angle Ia=(n-2)180 ---------- n that's the formula.
inversetan ( |m1 - m2/1+m1m2| )
For any polygon: 180-interior angle = exterior angle and the exterior angles of any polygon add up to 360 degrees