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If D is the mid-point of the side B C of...

If `D` is the mid-point of the side `B C` of triangle `A B C` and `A D` is perpendicular to `A C` , then `3b^2=a^2-c` (b) `3a^2=b^2 3c^2` `b^2=a^2-c^2` (d) `a^2+b^2=5c^2`

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