यदि एक समबाहु त्रिभुज का क्षेत्रफल 108√3 सेमी है, तब उस त्रिभुज के परिवृत्त की त्रिज्या की लंबाई ज्ञात कीजिए।

  1. 12 सेमी 
  2. 15 सेमी 
  3. 6 सेमी 
  4. 9 सेमी 

Answer (Detailed Solution Below)

Option 1 : 12 सेमी 
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Detailed Solution

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दिया गया है:

समबाहु त्रिभुज का क्षेत्रफल = 108√3 सेमी2

संकल्पना:

क्षेत्रमिति

प्रयोग किया गया सूत्र:

समबाहु त्रिभुज का क्षेत्रफल = \(\frac{{\sqrt 3 }}{4}{a^2}\)

गणना:

 माना त्रिभुज की भुजा = a

त्रिभुज का क्षेत्रफल:

\(\frac{{\sqrt 3 }}{4}{a^2} = 108\sqrt 3 \)

⇒ a = 12√3

त्रिभुज के परिवृत्त की त्रिज्या की लंबाई  = a/√3

= 12√3/√3

= 12 सेमी 
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