Sum of interior angles of a polygon of n sides = _____.

(2n - 1) × 90°

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(2n - 4) × 90°

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(2n - 2) × 90°

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(4n - 2) × 90°

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Solution

The correct option is B (2n - 4) × 90°
Sum of all interior angles of a polygon = (n-2) × 180⁰

Sum of all interior angles of a polygon = (n-2) × 2 × 90⁰

Sum of all interior angles of a polygon = (2n-4) × 90⁰.

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