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प्रश्न
The number of diagonals in a septagon is ______.
विकल्प
21
42
7
14
MCQ
रिक्त स्थान भरें
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उत्तर
The number of diagonals in a septagon is 14.
Explanation:
We know that, if a polygon has n sides, then
Number of diagonals = `(n(n - 3))/2`
A septagon is a polygon having seven sides, i.e. n = 7
Number of diagonals in septagon = `(7(7 - 3))/2` = 14
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Notes
A diagonal is a line segment joining two non-consecutive vertices of a polygon.
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