1.

AD is a median of the DeltaABC . If AE and AF are medians of the triangles ABD and ADC repectively , and AD=m_(1),AE=m_(2),AF=m_(3),then m_(2)^(2)+m_(3)^(2)-2m_(1)^(2)=

Answer»

`a^(2)`
`(a^(2))/(2)`
`(a^(2))/(4)`
`(a^(2))/(8)`

ANSWER :d


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