If the sum of the interior angles of a regular polygon be 1080 deg the number of sides of the polygo...........

Quantitative Aptitude ( CCS) Geometry

If the sum of the interior angles of a regular polygon be 1080°, the number of sides of the polygon is

We know that,
Sum of the interior angles of a regular polygon of n sides = (2n – 4) × 90°
∴ (2n – 4) × 90° = 1080°
2n – 4 = 12
2n = 16
n = 8

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