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[" Cuat point "D" is on the side "BC" of...

[" Cuat point "D" is on the side "BC" of an equilateral triangle "],[/_ABC" such that "DC=(1)/(4)BC" .Prove that "AD^(2)=13CD^(2)" ."]

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A point D is on the side BC of an equilateral triangle ABC such that DC=(1)/(4)BC. Prove that AD^(2)=13CD^(2)

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