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सिद्ध कीजिए कि बिन्दु (a, b + c), (b, c + a) व (c, a + b) संरेख हैं।

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सिद्ध कीजिए कि बिन्दु (a, b + c), (b, c + a) व (c, a + b) संरेख हैं।

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∆ का क्षेत्रफल = 1/2[(ac + a + ba + b2 + cb + c2) – (b2 + bc + c2 + ca + a2 + ab)]

= 1/2[0] = 0 वर्ग इकाई

∴ ये बिन्दु संरेख हैं।

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