[" 12.The base "BC" of "Delta ABC" is di...

[" 12.The base "BC" of "Delta ABC" is divided at "D" such that "],[BD=(1)/(2)DC" .Prove that "ar(Delta ABD)=(1)/(3)ar(Delta ABC)],[" A "D=(1)/(2)DC" .Prove that "arcsec" at "G," show that "]

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The base BC of Delta ABC is divided at D, so that BD=(1)/(2)DC. Prove that ar(Delta ABD)=(1)/(3)ar(Delta ABC)

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