एक वृत्त में निहित एक समबाहु त्रिभुज का क्षेत्रफल 4√3 सेमी2 है, तो वृत्त का क्षेत्रफल है:

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Territorial Army Paper I : Official Practice Test Paper - 2
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  1. \(\dfrac{16}{3}\pi\)
  2. \(\dfrac{22}{3}\pi\)
  3. \(\dfrac{28}{3}\pi\)
  4. \(\dfrac{32}{3}\pi\)

Answer (Detailed Solution Below)

Option 1 : \(\dfrac{16}{3}\pi\)
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दिया गया है:

एक वृत्त में एक समबाहु त्रिभुज निहित है।

समबाहु त्रिभुज का क्षेत्रफल = 4√3 सेमी2

प्रयुक्त अवधारणा:

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

गणना:

F3 Vinanti SSC 30.11.22 D1

\(\frac{{√ 3 }}{4}{a^2}\) = 4√3 

a2 = 16

a = 4

समबाहु त्रिभुज की परि-त्रिज्या = \(\frac{a}{{\sqrt 3 }}\)

r = \(\frac{4}{{\sqrt 3 }}\)

वृत्त का क्षेत्रफल = πr2

πr2 = \(\pi \times \frac{4}{{\sqrt 3 }} \times \frac{4}{{\sqrt 3 }}\)

क्षेत्रफल = \(\dfrac{16}{3}\pi\) सेमी2

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