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`ABCD` is a quadrilateral. Is `AB+BC+CD+DA > AC+BD ?` |
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Answer» `In/_ABC And /_ACD` AB+BC>AC CD+DA>AC From these equations AB+BC+CD+DA>2AC-(1) Similarly, AB+BC+CD+DA>2BD-(2) From equation 1 and 2 2(AB+BC+CD+DA)>2(AC+BD) AB+BC+CD+DA>AC+BD. |
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