Each interior angle of a regular polygon is 144 deg The number of sides of the polygon is ........

Quantitative Aptitude ( CCS) Geometry

Each interior angle of a regular polygon is 144°. The number of sides of the polygon is

If the number of sides of a polygon be n. Then,
180° – 360° /n = 144°
180° × n – 360° = 144° × n
36° × n = 360°
n = 10

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