AP EAMCET · Maths · Permutation Combination
If a polygon of \(n\) sides has 275 diagonals. then \(n\) is
- A \(25\)
- B \(35\)
- C \(20\)
- D \(15\)
Answer & Solution
Correct Answer
(A) \(25\)
Step-by-step Solution
Detailed explanation
Let \(n\) be the number of sides then Number of diagonals \(=\frac{n(n-3)}{2} \Rightarrow 275=\frac{n(n-3)}{2}\) \(\Rightarrow n=25\)
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