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Johny
Posts:
4
Registered:
12/10/04


how do i prove the following?
Posted:
Mar 13, 2004 12:29 AM


If ABCD is any quadrilateral and P and Q are the midpoints of its diagonals, prove
Vector (AB) squared + Vector (BC) squared + Vector (CD) squared + Vector (CA) squared = Vector (AC) squared + Vector (BD) squared + 4 * Vector(PQ) squared



