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किसी समबाहु त्रिभुज के परिवृत्त की त्रिज्या 8 cm है । त्रिभुज के अन्तवृत्त की त्रिज्या ज्ञात करें?
A. 3.25 cm
B. 3.50 cm
C. 4 cm
D. 4.25 cm

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Correct Answer - C
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समबाहु त्रिभुज की परिवृत्त त्रिज्या
`=(“side”)/(sqrt(3))=(“side”)/(sqrt(3))=8`
side `=8sqrt(3)`
`:.` समबाहु त्रिभुज की अंतः त्रिज्या
`=(“side”)/(2sqrt(3))=(8sqrt(3))/(2sqrt(3))=4cm`

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