The measurement of the final angle of the heptagon is; 124°
What is the sum of interior angles of a Polygon?
The formula for sum interior angles of a polygon is given as;
S = (n - 2) * 180°
A heptagon has 7 sides. Thus;
S = (7 - 2) * 180°
S = 900°
Since sum of angles except one is 776°, the the measurement of final angle is; θ = 900 - 776
θ = 124°
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