బహుభుజి యొక్క అంతర్గత కోణాల మొత్తం 21600 అయిన దాని భుజాల సంఖ్యను కనుగొనండి?

  1. 15
  2. 14
  3. 12
  4. 13

Answer (Detailed Solution Below)

Option 2 : 14
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Detailed Solution

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ఇచ్చిన దత్తాంశం:

అన్ని అంతర్గత కోణాల మొత్తం = 2160°

ఉపయోగించిన సూత్రం:

బహుభుజి యొక్క అంతర్గత కోణాల మొత్తం = (n - 2) × 180°

ఇక్కడ 'n' అనేది బహుభుజి యొక్క భుజాల సంఖ్య.

సాధన:

∵ బహుభుజి యొక్క అన్ని కోణాల మొత్తం = 2160°

⇒ (n - 2) × 180° = 2160° 

⇒ n - 2 = 2160°/180° 

⇒ n - 2 = 12

⇒ n = 12 + 2

⇒ n = 14

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