The angles of a 15-sided polygon are in arithmetic sequence. Which of those given below is an angle of this polygon ?
(1) 128°
(2) 130°
(3) 132°
(4) 156°
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Answer:
(4) 156°
explanation:
the no of side of polygon = 15, that means, n= 15.
The interior angle of 15-sided polygon
= {(n-2)×180°/n}
={(15-2)×180°/15}
={13×180°/15}
=156° (ans)
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