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Find the Sum for a 13-Sided Polygon

publish date: 2026/05/16 08:22:29.020716 UTC

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Find the sum of the angle measures of a 13-sided polygon.

n = 13 sidesS = (13 − 2) · 180°= 11 · 180° = ?

Correct Answer

1,980°

Explanation

Substitute \(n = 13\) into the formula:

\[S = (n-2) \cdot 180° = (13-2) \cdot 180° = 11 \cdot 180° = 1{,}980°\]

Reference

Mathematics for college students

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