The sum of the interior angles of any regular polygon of n sides is equal to 180(n - 2) degrees.
180 x 17 = 3060
3060/19 = 161.05
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Each interior angle measures 140 degrees
Each interior angle measures 140 degrees
Each interior angle will measure 162 degrees
Each interior angle will measure 156 degrees
Each interior angle is 140 degrees. Each exterior angle is 220 degrees.