In DeltaABC, perpendicular drawn from po...

In `DeltaABC`, perpendicular drawn from point A meets BC at points D. If `AD^(2)=BD`. DC then which of the following is correct.

A

ABC must be an obtuse angled triangle

B

ABC must be an acute angled triangle

C

Either `angleB ge 45^(@)` or `angle C ge 45^(@)`

D

`AC^(2) = AB^(2) + BC^(2)`

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