76 degrees
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14
Let's denote the measure of the angle as x degrees. The complementary angle would then be 90 - x degrees. According to the given information, we have the equation x = 14(90 - x). Solving this equation, we find x = 70 degrees and the complementary angle is 20 degrees.
It will have 14 sides and each interior angle will measure 2160/14 degrees
2160 degrees
2160 degrees (14-2)*180 = 2160