In the given figure, perpendiculars OD, OE and OF are drawn to sides B – InterviewSolution

1.	In the given figure, perpendiculars OD, OE and OF are drawn to sides BC, CA and AB respectively from apoint O in the interior of a AABC. Prove that: AF2 + BD" + CEă-OA + oB+ OC2-OD2-0E2-OF.8
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