Explanation:
Sum of known angles in
polygon=105+95+95+125= 420
Sum of angles in a polygon= 90(2n-4)
= 90×(2×5)-4
= 90×10-4
= 90×6=540°
Therefore x. = 540°-420°
=. 120°
Note:. n is the number of sides of the polygon.
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