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SSC CGL 2025 PYQ — Question 54

SSC CGL - 21 Sep 2025 - Shift 3 • Quantitative Aptitude • Q54

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The sum of all interior angles of a 20-sided polygon is:

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Correct answer: A

Explanation

The correct answer is option 1 i.e. 3240∘^\circ.

Sum of interior angles of an n-sided polygon: = (n - 2) × 180°

For n = 20

⇒ (20 - 2) × 180° = 18 × 180° = 3240°