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5. अपनी अभ्यास पुस्तिका पर एक angle POR = 60 deg तथा दूसरा कोण angle ABC = 45 deg खींचिए। angle POR में एक ऐसी रेखा QN खींचिए जिससे angle PQN = angle PQR- angle ABC हो जाएँ तथा angle PON का मान बताइये।

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ज्ञात है – बड़ा ∠PQR तथा छोटा कोण ∠ ABC

रचना करनी है – ∠PQN = ∠PQR – ∠ ABC के बराबर कोण की

रचना – सर्वप्रथम अज्ञात नाप का एक बड़ा ∠PQR तथा एक छोटा ∠ABC खींचिए। अब ∠ABC के बराबर रेखाखण्ड QR पर ∠NQR बनाइए।

अतः ∠NQR = ∠ABC

∠PQN = ∠PQR – ∠NQR

∠PQN =∠PQR – ∠ABC

\(\therefore\) ∠PQN = 15°

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