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समकोण त्रिभुज ABC में ∠B समकोण है। AB = 3 सेमी, BC = 4 सेमी। इस त्रिभुज की रचना कर इसका केन्द्रक ज्ञात कीजिए।

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रचना – 

सर्वप्रथम दी गई नाप के अनुसार एक समकोण त्रिभुज ABC FN बनाया। AB, BC तथा AC के मध्यबिन्दु क्रमशः F, D, E ज्ञात किए। त्रिभुज की माध्यिकाएँ AD, BE तथा CF खींची। तीनों माध्यिकाएँ एक-दूसरे को बिन्दु G पर काटती हैं। अतः बिन्दु G त्रिभुज का केन्द्रक है।

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