Need a little help on the proof of this question:
ABCD is a plane quadrilateral in which the lines joining the mid-
points of the opposite sides meet at O. the part F is any point in
the plane of the quadrilateral.
Prove that:
FA + FB + FC + FD = 4 FO
In anticipation
Thanks
Richard J
Bolton Institute
Email. [log in to unmask]
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