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ABC और A'B'C दो त्रिभुज है और G ,G ' उ...

ABC और ` A'B'C` दो त्रिभुज है और G ,G ' उनके केन्द्रक है,तो दर्शाइए की-
` " " vec ( A ) A'+ vec ( B) B ' + vec C C ' = 3vec G G '`

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