जर एका बहुभुज कोनाचा बाह्यकोन 45° असेल तर या बाह्यकोनातील कर्णांची संख्या शोधा. 

  1. 20
  2. 40
  3. 15
  4. 30

Answer (Detailed Solution Below)

Option 1 : 20
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Detailed Solution

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दिलेल्यानुसार:

बाह्यकोन = 45° 

वापरण्यात आलेले सूत्र:

बाह्यकोन = (360°/n)

बहुभुज कोनाच्या n बाजूच्या कर्णांची संख्या = (n2 - 3n)/2

जिथे, n = बहुभुजच्या बाजूच्या संख्येसमान

गणन:

बाह्यकोन = (360°/n)

⇒ 45° = (360°/n)

⇒ n = 8 

आता, बहुभुज कोनाच्या 'n'  बाजूच्या कर्णांची संख्या 

⇒ (n2 - 3n)/2

⇒ (64 - 24)/2

⇒ 20

∴ कर्णाची संख्या 20 आहे.

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