RRB NTPC 17 January 2017 Paper

Question : 1 of 120

Marks: +1, -0

Each exterior angle of a regular polygon measures 9 ̊ How many sides does the polygon have ?

Solution:

(2) We know that the measurement of the exterior angle of regular polygon is

360°/n

, where n is the number of sides.
Hence, 9° =

360°/n

⇒ n = 40 sides

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